Esculin

Esculin at a Glance

Esculin is the coumarin glucoside of horse-chestnut bark and ash bark — esculetin with a sugar attached, and a compound better known to microbiologists than to herbalists, since esculin hydrolysis is a standard bacterial identification test.

Its preclinical research covers anti-inflammatory activity through NF-kB and PPAR-gamma, antioxidant activity through Nrf2, and antidiabetic nephroprotection.

Esculin Is Not Aescin

The two words look alike, both come from Aesculus, and the confusion between them is the single most consequential error a reader can make about horse chestnut.

Aescin (escin) is a saponin complex — a large, sugar-bearing triterpene mixture — and it is what horse-chestnut seed extract is standardised to. The human clinical evidence for chronic venous insufficiency belongs to that standardised extract at a stated aescin dose.

Esculin is a small coumarin glucoside, chemically unrelated, and it is the compound removed or reduced during that standardisation. It is one of the reasons raw horse-chestnut seed, bark and leaf are not eaten.

So the two molecules sit on opposite sides of the same manufacturing step: one is the reason the extract is made, the other is the reason the raw plant is not used. Evidence must not be traded between them in either direction — aescin’s clinical record does not make esculin safe, and esculin’s toxic status does not make the standardised extract dangerous.

A third distinction runs alongside: esculin is a 6,7-dihydroxycoumarin glucoside, not a 4-hydroxycoumarin, so it carries none of warfarin’s mechanism. The bleeding-risk caution attached to horse chestnut comes from aescin’s antiplatelet activity, not from its coumarin content.

Esculin in the Microbiology Lab

Esculin’s largest real-world use has nothing to do with herbal medicine. It is a standard reagent in clinical microbiology, and most of the world’s supply is consumed by diagnostic laboratories rather than by anything therapeutic.

The bile-esculin test distinguishes enterococci and group-D streptococci from the other viridans streptococci. The medium contains esculin and a high concentration of bile salts; bacteria that tolerate the bile and possess β-glucosidase hydrolyse esculin to esculetin, which chelates the iron in the medium to form a black complex. A blackened plate is a positive result. Run under optimised conditions — 40% bile, a standardised 10⁶ CFU inoculum and 24 hours — it reaches better than 99% sensitivity and 97% specificity across several hundred strains ^{13Reference 13Chuard C · 1998Bile-esculin test for presumptive identification of enterococci and streptococci: effects of bile concentration, inoculation technique, and incubation time — clinical microbiology studyView study →}. The same reagent, with vancomycin added, is how bile-esculin-azide agar screens for vancomycin-resistant enterococci.

The chemistry that makes the test work is exactly the chemistry that governs the molecule pharmacologically: esculin is a β-glucosidase substrate, and the enzyme that a laboratory uses to identify a bacterium is the same enzyme a person’s gut bacteria use to convert an oral dose into its aglycone.

Its other laboratory life is optical. Esculin fluoresces a strong blue in solution, and horse-chestnut bark infusion was one of the classic fluorescent liquids of nineteenth-century physics — studied by George Gabriel Stokes in the work that established fluorescence as a phenomenon ^{15Reference 15Stokes GG · 1860Note on paviinView study →}. That fluorescence is why the bark was later used as an additive in early sunscreens and why esculin still turns up as a fluorescent tracer.

What It's Used For

Esculin (aesculin) is a coumarin glucoside — esculetin 6-O-β-D-glucoside — of horse-chestnut and ash bark — the two accuracy points above (it is not aescin, and it is not a warfarin-type anticoagulant) hold throughout. Its own research is preclinical: anti-inflammatory, antioxidant and antidiabetic-nephroprotective signals in rodents, with no human trials of the isolate.

Consistent rodent anti-inflammatory and organ-protective signals:NF-κB/PPARγ restraint in colitis and lung injury, Nrf2 antioxidant activation, and renal protection in diabetic models ^{2,3,5,6Reference 2Tian X et al. · 2019AnimalAesculin protects against DSS-induced colitis through activating PPARγ and inhibiting the NF-κB pathway — mouse modelView study →Reference 3Tianzhu Z · 2015AnimalEsculin Inhibits the Inflammation of LPS-Induced Acute Lung Injury in Mice via Regulation of TLR/NF-κB Pathways — mouse modelView study →Reference 5Kim KH et al. · 2016In vitroGlycosylation enables aesculin to activate Nrf2 — in vitro and mouse modelView study →Reference 6Kang KS et al. · 2014AnimalProtective effect of esculin on streptozotocin-induced diabetic renal damage in mice — mouse modelView study →}.

The honest headline:no human trials; the venotonic reputation belongs to aescin, not esculin; and esculin is the named toxic coumarin of a plant classed as poisonous, though its intrinsic acute toxicity is modest ^{7Reference 7Wang YH et al. · 2015AnimalEsculin improves dyslipidemia, inflammation and renal damage in streptozotocin-induced diabetic rats — rat in vivo animal modelView study →}.

Evidence by IndicationStrength of support · Beta

Mechanisms

Target / pathway	Effect	Relevant to
NF-κB (IκBα–p65)	suppressed	anti-inflammatory (colitislung injury)
PPARγ	activated	colitis protection
TLR signaling; neutrophil recruitment	downregulated; reduced	acute lung injury
Nrf2 / antioxidant response	activated (glucoside-dependent)	antioxidant / cytoprotection
P2X7 / mitochondrial function; MAPK	↓ P2X7, restored function; modulated	diabetic nephropathy
β-glucosidase substrate → esculetin	hydrolyzed	pharmacokinetics + the bile-esculin lab test

Pharmacokinetics

Esculin behaves like other dietary glucosides: it is poorly absorbed intact, and the sugar has to be cleaved by gut-microbial β-glucosidase to release the better-absorbed aglycone esculetin ^{10Reference 10Modrackova N et al. · 2020In vitroBifidobacterium β-Glucosidase Activity and Fermentation of Dietary Plant Glucosides Is Species and Strain Specific — in vitroView study →}.

One experiment puts a number on the gap. Beagle dogs given a single oral dose of a plant extract containing both molecules reached a peak plasma concentration of 46.75 ± 7.46 ng/mL of esculin against 209.9 ± 57.65 ng/mL of esculetin — the aglycone roughly four and a half times higher, from the same dose in the same animals — and esculin peaked latest of the four coumarins measured, at 1.32 ± 0.38 hours, which is what a molecule waiting on bacterial cleavage looks like ^{12Reference 12Wang Z et al. · 2018Simultaneous Determination of Aesculin, Aesculetin, Fraxetin, Fraxin and Polydatin in Beagle Dog Plasma by UPLC-ESI-MS/MS and Its Application in a Pharmacokinetic Study after Oral Administration Extracts of Ledum palustre L. — animal pharmacokinetic modelView study →}. Rat plasma work confirms both compounds are measurable with low exposure of the intact glucoside, and that disposition differs between inflamed and healthy animals ^{11Reference 11Yang L et al. · 2017AnimalSimultaneous determination of anemoside B4, phellodendrine, berberine, palmatine, obakunone, esculin and esculetin in rat plasma by UPLC-ESI-MS/MS and its application to a comparative pharmacokinetic study in normal and ulcerative colitis rats — rat pharmacokinetic animal modelView study →}.

How much conversion happens is individual. β-glucosidase activity and the ability to ferment plant glucosides vary by bacterial species and even by strain within Bifidobacterium ^{10Reference 10Modrackova N et al. · 2020In vitroBifidobacterium β-Glucosidase Activity and Fermentation of Dietary Plant Glucosides Is Species and Strain Specific — in vitroView study →}, so the same oral dose is not the same exposure in two people. No human pharmacokinetic study of esculin exists.

One nuance cuts against reading esculin as a simple prodrug. Glycosylation is not always inert: aesculin only marginally activated Nrf2, while a further-glycosylated derivative activated it robustly and suppressed neutrophilic lung inflammation in mice, in an Nrf2-dependent way ^{5Reference 5Kim KH et al. · 2016In vitroGlycosylation enables aesculin to activate Nrf2 — in vitro and mouse modelView study →}. The sugar is part of what the molecule does, not only a barrier to absorption.

Clinical Trials

There are no human clinical trials of isolated esculin for any indication. The human vascular-insufficiency evidence associated with horse chestnut belongs to standardised seed extract dosed to aescin — from which esculin is deliberately reduced — and does not transfer.

Completed	Planned	Terminated	Preclinical
—(none, isolate)	—	—	Moderate

Last checked: September 2026.

Isolate vs. Plant Studies

The isolate evidence is reasonably clean: the colitis, acute-lung-injury and diabetic-nephropathy studies all used purified esculin at stated doses in rodents ^{2,3,4,6,7,8,9Reference 2Tian X et al. · 2019AnimalAesculin protects against DSS-induced colitis through activating PPARγ and inhibiting the NF-κB pathway — mouse modelView study →Reference 3Tianzhu Z · 2015AnimalEsculin Inhibits the Inflammation of LPS-Induced Acute Lung Injury in Mice via Regulation of TLR/NF-κB Pathways — mouse modelView study →Reference 4Ni J et al. · 2023AnimalEsculin alleviates LPS-induced acute lung injury via inhibiting neutrophil recruitment and migration — mouse modelView study →Reference 6Kang KS et al. · 2014AnimalProtective effect of esculin on streptozotocin-induced diabetic renal damage in mice — mouse modelView study →Reference 7Wang YH et al. · 2015AnimalEsculin improves dyslipidemia, inflammation and renal damage in streptozotocin-induced diabetic rats — rat in vivo animal modelView study →Reference 8Serralha RS et al. · 2020AnimalEsculin reduces P2X7 and reverses mitochondrial dysfunction in the renal cortex of diabetic rats — rat in vivo animal modelView study →Reference 9Song Y et al. · 2018AnimalEsculin ameliorates cognitive impairment in experimental diabetic nephropathy and induces anti-oxidative stress and anti-inflammatory effects via the MAPK pathway — animal modelView study →}. The complication is not the study design but the conversion. Because gut bacteria strip the sugar, an oral dose of esculin is partly an experiment on esculetin, and few of these studies distinguish which molecule produced the effect. The Nrf2 result is the exception, and it argues the intact glucoside does something of its own ^{5Reference 5Kim KH et al. · 2016In vitroGlycosylation enables aesculin to activate Nrf2 — in vitro and mouse modelView study →}.

On the plant side, the transfer is unusually easy to state and unusually negative. The human clinical literature on horse chestnut is about a preparation from which esculin has been deliberately removed, so none of it is evidence about this molecule. Ash bark (Cortex Fraxini) is used traditionally and does deliver esculin, alongside esculetin, fraxetin and fraxin — but there is no trial of ash bark to transfer either.

The practical position: this molecule has a rodent evidence base, a diagnostic-reagent career, and no human therapeutic evidence in any preparation.

Its Role in Plants

Esculin is how a plant stores esculetin. Attaching glucose at the 6-position makes the molecule water-soluble enough to accumulate in the vacuole and caps one of the two catechol hydroxyls, so the reactive free catechol is only released when something — a wound, a pathogen, a herbivore’s gut — supplies a glucosidase. That is the standard plant strategy for a phenolic that is useful as a weapon but costly to keep loose in the cell.

The plants that invest most in it are barks: horse chestnut and ash, both of which carry the whole coumarin series (esculin, esculetin, fraxin, fraxetin) rather than one compound. The concentration in bark rather than fruit is consistent with a defence against boring insects and bark pathogens.

Esculin’s fluorescence may not be incidental to this. Strongly UV-absorbing phenolics in bark and outer tissue act as sunscreens for the tissue beneath, and esculin absorbs in exactly the range that job requires — the same property that made horse-chestnut bark extract a nineteenth-century curiosity and, later, a sunscreen additive ^{15Reference 15Stokes GG · 1860Note on paviinView study →}.

Prevalence in Nature

Esculin is concentrated in the barks of two families — Sapindaceae (Aesculus) and Oleaceae (Fraxinus) — and is a minor constituent almost everywhere else.

Horse chestnut (Aesculus hippocastanum) carries it in bark, seed, leaf and unripe conker; it is the named coumarin behind the raw plant’s toxicity and the compound reduced when seed is processed into standardised extract. Ash bark (Fraxinus spp., Cortex Fraxini) is the other principal source and is used as a herbal material in its own right, carrying esculin with esculetin, fraxetin and fraxin — the four are routinely quantified together, which is why they keep appearing in the same studies ^{12Reference 12Wang Z et al. · 2018Simultaneous Determination of Aesculin, Aesculetin, Fraxetin, Fraxin and Polydatin in Beagle Dog Plasma by UPLC-ESI-MS/MS and Its Application in a Pharmacokinetic Study after Oral Administration Extracts of Ledum palustre L. — animal pharmacokinetic modelView study →}. Manna ash (F. ornus) is a named source. It also occurs in Daphne species, in sagebrush (Artemisia tridentata) alongside scopoletin and isoscopoletin, and in marsh Labrador tea (Ledum palustre), the plant used in the comparative dog pharmacokinetic study ^{12Reference 12Wang Z et al. · 2018Simultaneous Determination of Aesculin, Aesculetin, Fraxetin, Fraxin and Polydatin in Beagle Dog Plasma by UPLC-ESI-MS/MS and Its Application in a Pharmacokinetic Study after Oral Administration Extracts of Ledum palustre L. — animal pharmacokinetic modelView study →}.

No quantified content figure was found for any of these sources, so the table below records source and part rather than concentration.

Major Natural Sources

Source	Family	Part	Notes
Horse chestnut (Aesculus hippocastanum)	Sapindaceae	Bark, seed, leaf, unripe conker	The named toxic coumarin of the raw plant; removed in aescin standardisation
Ash (Fraxinus spp., Cortex Fraxini)	Oleaceae	Bark	With esculetin, fraxetin and fraxin; the four are quantified together ^{12Reference 12Wang Z et al. · 2018Simultaneous Determination of Aesculin, Aesculetin, Fraxetin, Fraxin and Polydatin in Beagle Dog Plasma by UPLC-ESI-MS/MS and Its Application in a Pharmacokinetic Study after Oral Administration Extracts of Ledum palustre L. — animal pharmacokinetic modelView study →}
Manna ash (Fraxinus ornus)	Oleaceae	Bark	Named source
Marsh Labrador tea (Ledum palustre)	Ericaceae	Aerial	The extract used in the comparative dog PK study ^{12Reference 12Wang Z et al. · 2018Simultaneous Determination of Aesculin, Aesculetin, Fraxetin, Fraxin and Polydatin in Beagle Dog Plasma by UPLC-ESI-MS/MS and Its Application in a Pharmacokinetic Study after Oral Administration Extracts of Ledum palustre L. — animal pharmacokinetic modelView study →}
Sagebrush (Artemisia tridentata)	Asteraceae	Aerial	With scopoletin and isoscopoletin
Daphne spp.	Thymelaeaceae	Bark	Minor

Discovery & Synthesis

Esculin is named for the horse chestnut, Aesculus, and it was one of the crystallisable plant substances that nineteenth-century chemistry could actually get hold of — which is why it appears so early and so often. Friedrich Rochleder worked systematically through the crystallised constituents of Aesculus hippocastanum in the early 1860s, separating esculin from the other fluorescent substances of the bark ^{14Reference 14Rochleder F · 1863Ueber die krystallisirten Bestandtheile der Rosskastanie (Aesculus Hippocastanum L.)View study →}; the fluorescence itself drew the attention of physicists, and George Gabriel Stokes examined the horse-chestnut bark substances in the course of the work that founded the study of fluorescence ^{15Reference 15Stokes GG · 1860Note on paviinView study →}.

The structure took another decade. Hugo Schiff established esculin’s constitution through the 1870s and 1880s, working out that it was a glucoside of a dihydroxycoumarin and preparing acetyl derivatives of both halves ^{16Reference 16Schiff H · 1871Zur Constitution des AesculinsView study →}. The aglycone was first synthesised in 1899 by Ludwig Gattermann and M. Köbner, who made aesculetin and daphnetin together ^{17Reference 17Gattermann L · 1899Synthese des Daphnetins und AesculetinsView study →} — the glucoside itself is not usefully synthesised, because extraction is trivial.

Manufacture today is extraction, from horse-chestnut or ash bark, and the market is dominated by diagnostic microbiology rather than by anything medicinal: esculin is a listed reagent for bile-esculin and esculin-hydrolysis media ^{13Reference 13Chuard C · 1998Bile-esculin test for presumptive identification of enterococci and streptococci: effects of bile concentration, inoculation technique, and incubation time — clinical microbiology studyView study →}. It is sold as a research and laboratory chemical, not as a supplement.

Patents: not yet researched.

Toxicity & Safety

Esculin is the compound repeatedly named as a reason raw horse chestnut is not eaten — and it is deliberately stripped out when horse-chestnut seed is standardised into aescin extract. That status, not any measured potency, is what sets the level of caution here.

Safety at a Glance

Moderate toxicity

A named reason raw horse chestnut is not eaten. Seeds, unripe conkers, bark and leaf — and it is reduced or removed during aescin standardization.
Avoid in pregnancy and lactation. A coumarin glucoside from a plant classed as poisonous, with no reproductive data.
Not a warfarin-type anticoagulant. A 6,7-dihydroxycoumarin glucoside, not a 4-hydroxycoumarin, and not the hepatotoxic fragrance “coumarin.”
Not the sole poison. Raw horse-chestnut poisoning is multifactorial — saponins and aescin contribute too, which is why the flag is moderate rather than high.
Intrinsic acute toxicity appears modest. It is dosed orally at mg/kg in rodent studies without reported lethality.

Full Safety & Interactions Detail

Esculin is the coumarin repeatedly named as a reason raw horse chestnut — seeds, unripe conkers, bark and leaf — is not eaten, and it is deliberately reduced or removed when horse-chestnut seed is standardised into aescin extract — the reason it carries more caution than an ordinary plant coumarin.

The honest counterweight is that esculin’s intrinsic acute toxicity appears modest: it is dosed orally at 10–50 mg/kg in the rodent studies above without reported lethality ^{2,6,7Reference 2Tian X et al. · 2019AnimalAesculin protects against DSS-induced colitis through activating PPARγ and inhibiting the NF-κB pathway — mouse modelView study →Reference 6Kang KS et al. · 2014AnimalProtective effect of esculin on streptozotocin-induced diabetic renal damage in mice — mouse modelView study →Reference 7Wang YH et al. · 2015AnimalEsculin improves dyslipidemia, inflammation and renal damage in streptozotocin-induced diabetic rats — rat in vivo animal modelView study →}, and it is used at gram scale in microbiology media. Raw horse-chestnut poisoning is also multifactorial — saponins and aescin contribute — so esculin is not the sole poison. The class disclaimers are handled above: it is a 6,7-dihydroxycoumarin glucoside, not a 4-hydroxycoumarin, so warfarin’s mechanism does not apply, and it is not the hepatotoxic fragrance “coumarin”; the bleeding caution around horse chestnut derives from aescin’s antiplatelet activity.

What has not been assessed. No repeat-dose toxicology, genotoxicity package, interaction study or human exposure data exists for isolated esculin. The absence of reported harm from a laboratory reagent is not a safety dataset for an ingested compound.

Dosage

There is no established human dose. Esculin has never been given to a person as an isolate, and it is not sold as a supplement — it is sold as a laboratory reagent. The figures below are the exposures used in the research described above.

Setting	Model	Dose used
Colitis (DSS)	Mouse, oral	~10–50 mg/kg daily ^{2Reference 2Tian X et al. · 2019AnimalAesculin protects against DSS-induced colitis through activating PPARγ and inhibiting the NF-κB pathway — mouse modelView study →}
Acute lung injury (LPS)	Mouse	~10–50 mg/kg ^{3,4Reference 3Tianzhu Z · 2015AnimalEsculin Inhibits the Inflammation of LPS-Induced Acute Lung Injury in Mice via Regulation of TLR/NF-κB Pathways — mouse modelView study →Reference 4Ni J et al. · 2023AnimalEsculin alleviates LPS-induced acute lung injury via inhibiting neutrophil recruitment and migration — mouse modelView study →}
Diabetic renal damage	Mouse and rat, oral	~10–50 mg/kg daily ^{6,7,8,9Reference 6Kang KS et al. · 2014AnimalProtective effect of esculin on streptozotocin-induced diabetic renal damage in mice — mouse modelView study →Reference 7Wang YH et al. · 2015AnimalEsculin improves dyslipidemia, inflammation and renal damage in streptozotocin-induced diabetic rats — rat in vivo animal modelView study →Reference 8Serralha RS et al. · 2020AnimalEsculin reduces P2X7 and reverses mitochondrial dysfunction in the renal cortex of diabetic rats — rat in vivo animal modelView study →Reference 9Song Y et al. · 2018AnimalEsculin ameliorates cognitive impairment in experimental diabetic nephropathy and induces anti-oxidative stress and anti-inflammatory effects via the MAPK pathway — animal modelView study →}
Comparative pharmacokinetics	Beagle dog, oral (as plant extract)	Cmax 46.75 ng/mL at 1.32 h ^{12Reference 12Wang Z et al. · 2018Simultaneous Determination of Aesculin, Aesculetin, Fraxetin, Fraxin and Polydatin in Beagle Dog Plasma by UPLC-ESI-MS/MS and Its Application in a Pharmacokinetic Study after Oral Administration Extracts of Ledum palustre L. — animal pharmacokinetic modelView study →}

Herbal exposure is not something to titrate toward. Esculin reaches people from raw horse-chestnut material — which is the exposure the plant’s toxicity warnings are about — and from ash bark, at unquantified levels. The standardised horse-chestnut extract that has human evidence is the preparation esculin has been taken out of. These are doses studied in research and are not a personal recommendation.

References

Ju S, Tan Y, Wang Q, et al. (2024). Antioxidant and anti-inflammatory effects of esculin and esculetin — review. Experimental and Therapeutic Medicine. https://pubmed.ncbi.nlm.nih.gov/38682114/
Tian X, Peng Z, Luo S, et al. (2019). Aesculin protects against DSS-induced colitis through activating PPARγ and inhibiting the NF-κB pathway — mouse model. European Journal of Pharmacology. https://pubmed.ncbi.nlm.nih.gov/31202807/
Tianzhu Z, Shumin W (2015). Esculin Inhibits the Inflammation of LPS-Induced Acute Lung Injury in Mice via Regulation of TLR/NF-κB Pathways — mouse model. Inflammation. https://pubmed.ncbi.nlm.nih.gov/25676436/
Ni J, Li G, Dai N, et al. (2023). Esculin alleviates LPS-induced acute lung injury via inhibiting neutrophil recruitment and migration — mouse model. International Immunopharmacology. https://pubmed.ncbi.nlm.nih.gov/37068336/
Kim KH, Park H, Park HJ, et al. (2016). Glycosylation enables aesculin to activate Nrf2 — in vitro and mouse model. Scientific Reports. https://pubmed.ncbi.nlm.nih.gov/27417293/
Kang KS, Lee W, Jung Y, et al. (2014). Protective effect of esculin on streptozotocin-induced diabetic renal damage in mice — mouse model. Journal of Agricultural and Food Chemistry. https://pubmed.ncbi.nlm.nih.gov/24484395/
Wang YH, Liu YH, He GR, et al. (2015). Esculin improves dyslipidemia, inflammation and renal damage in streptozotocin-induced diabetic rats — rat in vivo animal model. BMC Complementary and Alternative Medicine. https://pubmed.ncbi.nlm.nih.gov/26552745/
Serralha RS, Rodrigues IF, Bertolini A, et al. (2020). Esculin reduces P2X7 and reverses mitochondrial dysfunction in the renal cortex of diabetic rats — rat in vivo animal model. Life Sciences. https://pubmed.ncbi.nlm.nih.gov/32417372/
Song Y, Wang X, Qin S, et al. (2018). Esculin ameliorates cognitive impairment in experimental diabetic nephropathy and induces anti-oxidative stress and anti-inflammatory effects via the MAPK pathway — animal model. Molecular Medicine Reports. https://pubmed.ncbi.nlm.nih.gov/29568860/
Modrackova N, Vlkova E, Tejnecky V, et al. (2020). Bifidobacterium β-Glucosidase Activity and Fermentation of Dietary Plant Glucosides Is Species and Strain Specific — in vitro. Microorganisms. https://pubmed.ncbi.nlm.nih.gov/32503148/
Yang L, Meng X, Yu X, et al. (2017). Simultaneous determination of anemoside B4, phellodendrine, berberine, palmatine, obakunone, esculin and esculetin in rat plasma by UPLC-ESI-MS/MS and its application to a comparative pharmacokinetic study in normal and ulcerative colitis rats — rat pharmacokinetic animal model. Journal of Pharmaceutical and Biomedical Analysis. https://pubmed.ncbi.nlm.nih.gov/27875787/
Wang Z, Zhu W, Liu H, et al. (2018). Simultaneous Determination of Aesculin, Aesculetin, Fraxetin, Fraxin and Polydatin in Beagle Dog Plasma by UPLC-ESI-MS/MS and Its Application in a Pharmacokinetic Study after Oral Administration Extracts of Ledum palustre L. — animal pharmacokinetic model. Molecules. https://pubmed.ncbi.nlm.nih.gov/30205426/
Chuard C, Reller LB (1998). Bile-esculin test for presumptive identification of enterococci and streptococci: effects of bile concentration, inoculation technique, and incubation time — clinical microbiology study. Journal of Clinical Microbiology. https://pubmed.ncbi.nlm.nih.gov/9542954/
Rochleder F (1863). Ueber die krystallisirten Bestandtheile der Rosskastanie (Aesculus Hippocastanum L.). Journal für Praktische Chemie. https://doi.org/10.1002/prac.18630900163
Stokes GG (1860). Note on paviin. Quarterly Journal of the Chemical Society. https://doi.org/10.1039/qj8601200126
Schiff H (1871). Zur Constitution des Aesculins. Berichte der deutschen chemischen Gesellschaft. https://doi.org/10.1002/cber.187100401156
Gattermann L, Köbner M (1899). Synthese des Daphnetins und Aesculetins. Berichte der deutschen chemischen Gesellschaft. https://doi.org/10.1002/cber.18990320146