Cinnamoylcocaine

Cinnamoylcocaine at a Glance

Cinnamoylcocaine is a minor tropane alkaloid of coca (Erythroxylum). Structurally it is cocaine with a cinnamoyl group in place of the benzoyl group — an ecgonine ester, hence its systematic name methylecgonine cinnamate. It occurs naturally as two geometric isomers, cis- and trans-cinnamoylcocaine, and both are genuine endogenous constituents of the leaf rather than extraction artefacts ^{1Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →}.

Its documented significance is chemotaxonomic and forensic, not therapeutic. The two isomers, and their ratio to cocaine, feature in the analytical “fingerprint” used to characterise Erythroxylum species and cultigens and to profile seized coca leaf and illicit cocaine ^{1,5,6,8Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →Reference 5Casale JF et al. · 2014Chemosystematic identification of fifteen new cocaine-bearing Erythroxylum cultigens grown in Colombia for illicit cocaine productionView study →Reference 6Lurie IS et al. · 1987Analysis of manufacturing by-products and impurities in illicit cocaine via high-performance liquid chromatography and photodiode array detectionView study →Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →}. As a pharmacological agent in its own right it is barely characterised: a single early study showed it behaves as a weak, cocaine-like ligand in vitro, and a 1984 review of the coca alkaloids concluded that “hardly anything is known” about the biological activity of the minor tropanes ^{3,4Reference 3Novák M et al. · 1984Biological activity of the alkaloids of Erythroxylum coca and Erythroxylum novogranatenseView study →Reference 4Calligaro DO · 1987Central and peripheral cocaine receptorsView study →}.

This page treats the molecule in that scholarly frame. Cinnamoylcocaine belongs to the controlled cocaine family; nothing here is a use, preparation or dosing guide.

The Chemotaxonomic & Origin-Fingerprinting Marker

The reason cinnamoylcocaine has its own literature is analytical chemistry, not pharmacology. Because it travels with cocaine through the coca plant and through illicit processing, its two isomers and their proportions carry information about which plant and what handling produced a given sample.

A confirmed endogenous pair. Careful GC–MS work established that cocaine and cis- and trans-cinnamoylcocaine are the true endogenous alkaloids of E. coca leaf, and that ecgonine methyl ester appearing in some extracts is a breakdown product of harsh solvent extraction rather than a native constituent ^{1Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →}. This matters: a chemotaxonomic marker is only meaningful once the analyst can tell a real leaf alkaloid from an artefact.

A qualified taxonomic marker. The relative amounts of these alkaloids change with species, variety and leaf age ^{1Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →}. That variation is the basis for using them to tell Erythroxylum taxa apart — and forms part of broader Erythroxylaceae chemosystematics ^{2Reference 2Hegnauer R · 1981Chemotaxonomy of Erythroxylaceae (including some ethnobotanical notes on Old World species)View study →}, including the chemosystematic identification of fifteen new cocaine-bearing cultigens grown in Colombia ^{5Reference 5Casale JF et al. · 2014Chemosystematic identification of fifteen new cocaine-bearing Erythroxylum cultigens grown in Colombia for illicit cocaine productionView study →}. But the same study that pinned down the endogenous alkaloids also delivered the honest caveat: leaf-to-leaf variation was too great to use a simple cocaine-to-cinnamoylcocaine ratio, on its own, as a taxonomic marker ^{1Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →}. The signal is real but noisy, and works best as one input to a multi-alkaloid profile rather than a single decisive ratio.

A forensic signature compound. In illicit-cocaine analysis, cis- and trans-cinnamoylcocaine are standard manufacturing by-product / impurity peaks in the chromatographic “signature profile” of a seizure, used alongside benzoylecgonine, the truxillines and other alkaloids to compare and classify samples ^{6,7Reference 6Lurie IS et al. · 1987Analysis of manufacturing by-products and impurities in illicit cocaine via high-performance liquid chromatography and photodiode array detectionView study →Reference 7Moore JM · 1994Determination and in-depth chromatographic analyses of alkaloids in South American and greenhouse-cultivated coca leavesView study →}. This impurity profiling underpins strategic drug-intelligence programmes that compare cocaine across regions and shipments ^{11Reference 11Lociciro S et al. · 2007Cocaine profiling for strategic intelligence purposes, a cross-border project between France and SwitzerlandView study →}. The isomers even generate second-order signatures: their oxidation during crude-base processing yields characteristic dihydroxy-phenylpropionylecgonine methyl ester diols, whose appearance flags how a batch was refined ^{8Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →}.

What It's Used For

The evidence here is unusual for a compound page: it is strong on analytical / forensic use and thin-to-absent on pharmacology. The split below reflects that.

Evidence by IndicationStrength of support · Beta

Support is an experimental score — here weighted toward the volume and directness of the documentation for each role (established analytical use > single focused studies > in-vitro pharmacology). A beta, not a validated metric. This molecule’s roles are chemotaxonomic/forensic, so read each row as “how well documented is this use,” not “how effective a medicine.”

01Forensic Signature / Origin ProfilingPromising68%Decades of DEA/forensic impurity profiling of coca & illicit cocaine; oxidation-product signatures ^{6,7,8,11Reference 6Lurie IS et al. · 1987Analysis of manufacturing by-products and impurities in illicit cocaine via high-performance liquid chromatography and photodiode array detectionView study →Reference 7Moore JM · 1994Determination and in-depth chromatographic analyses of alkaloids in South American and greenhouse-cultivated coca leavesView study →Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →Reference 11Lociciro S et al. · 2007Cocaine profiling for strategic intelligence purposes, a cross-border project between France and SwitzerlandView study →}

02Biomarker of Coca-Leaf UsePromising52%Controlled human hair-analysis study; CIN/COC ratio discriminates chewing vs. abuse ^{9Reference 9Rubio NC et al. · 2015Possibilities for discrimination between chewing of coca leaves and abuse of cocaine by hair analysis including hygrine, cuscohygrine, cinnamoylcocaine and cocaine metabolite/cocaine ratiosView study →}

03Chemotaxonomic Species MarkerShaky40%Species/variety/leaf-age differences, but simple ratio limited by leaf-to-leaf variation ^{1,2,5Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →Reference 2Hegnauer R · 1981Chemotaxonomy of Erythroxylaceae (including some ethnobotanical notes on Old World species)View study →Reference 5Casale JF et al. · 2014Chemosystematic identification of fifteen new cocaine-bearing Erythroxylum cultigens grown in Colombia for illicit cocaine productionView study →}

04Cocaine-Like Pharmacology (In Vitro)Shaky22%A single in-vitro binding/uptake study; weaker than cocaine; otherwise uncharacterised ^{3,4Reference 3Novák M et al. · 1984Biological activity of the alkaloids of Erythroxylum coca and Erythroxylum novogranatenseView study →Reference 4Calligaro DO · 1987Central and peripheral cocaine receptorsView study →}

Mechanisms

The one real pharmacology datum is a qualitative “cocaine-like but weaker” in-vitro profile ^{4Reference 4Calligaro DO · 1987Central and peripheral cocaine receptorsView study →}; everything downstream — potency in vivo, CNS effects, local-anaesthetic activity — is unstudied for cinnamoylcocaine specifically ^{3Reference 3Novák M et al. · 1984Biological activity of the alkaloids of Erythroxylum coca and Erythroxylum novogranatenseView study →}.

Pharmacokinetics

No dedicated pharmacokinetic data exist for cinnamoylcocaine as an isolate — no absorption, oral bioavailability, metabolism, active-metabolite or half-life figures have been established for the pure compound. What is documented is analytical detectability rather than disposition: cinnamoylcocaine incorporates into hair after coca-leaf use and can be measured there ^{9Reference 9Rubio NC et al. · 2015Possibilities for discrimination between chewing of coca leaves and abuse of cocaine by hair analysis including hygrine, cuscohygrine, cinnamoylcocaine and cocaine metabolite/cocaine ratiosView study →}, and it survives (and partly oxidises) through illicit-cocaine processing, which is why it appears in seizure signature profiles ^{8Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →}. Any assumption of cocaine-like handling is inference from structure, not measured data.

Clinical Trials

There are no clinical trials of cinnamoylcocaine — it is not a therapeutic candidate and is studied only as an analytical marker. The nearest human data are the forensic hair-analysis cohort used to discriminate coca chewing from cocaine abuse ^{9Reference 9Rubio NC et al. · 2015Possibilities for discrimination between chewing of coca leaves and abuse of cocaine by hair analysis including hygrine, cuscohygrine, cinnamoylcocaine and cocaine metabolite/cocaine ratiosView study →}.

Last checked: July 2026.

Isolate vs. Plant Studies

The usual isolate-vs-plant tension is nearly absent here because there is almost no pharmacology to attribute in either direction. The pharmacological signal that does exist is isolate work — (−)-cinnamoylcocaine tested directly in vitro, where it is a weaker cocaine-like ligand ^{4Reference 4Calligaro DO · 1987Central and peripheral cocaine receptorsView study →}. Everything else is plant-matrix analytical chemistry: cinnamoylcocaine is detected and quantified within coca leaf, seed, illicit cocaine and human hair, where it is one alkaloid among many and its behaviour (species variation, processing oxidation, hair incorporation) is a property of the mixture and its handling ^{1,8,9Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →Reference 9Rubio NC et al. · 2015Possibilities for discrimination between chewing of coca leaves and abuse of cocaine by hair analysis including hygrine, cuscohygrine, cinnamoylcocaine and cocaine metabolite/cocaine ratiosView study →}. No whole-plant effect has ever been ascribed specifically to this constituent.

Prevalence in Nature

Cinnamoylcocaine occurs in cultivated Erythroxylum — E. coca and E. novogranatense and their varieties — as a minor leaf alkaloid, well below cocaine, the principal alkaloid (~0.5–1% leaf dry weight). Both cis- and trans-cinnamoylcocaine are confirmed endogenous constituents of the leaf, and their amounts relative to cocaine shift with species, variety and leaf age ^{1Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →}. It sits within the roughly eighteen alkaloids catalogued across the four cultivated varieties, alongside benzoylecgonine, tropacocaine, ecgonine methyl ester, the truxillines, hygrine and cuscohygrine ^{3Reference 3Novák M et al. · 1984Biological activity of the alkaloids of Erythroxylum coca and Erythroxylum novogranatenseView study →}.

It is not confined to the leaf: analysis of E. coca var. coca seeds from Bolivia detected both cis- and trans-cinnamoylcocaine (with methylecgonidine as the primary seed constituent) — relevant because seed-extraction material added to leaf-derived cocaine can alter impurity signatures ^{10Reference 10Casale JF et al. · 2005Alkaloid content of the seeds from Erythroxylum coca var. cocaView study →}. Absolute concentrations of the isomers are not cleanly quantified as a stable percentage — the leaf-to-leaf variation that limits their taxonomic use also means no single representative figure applies ^{1Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →}.

Discovery & Synthesis

Cinnamoylcocaine is a long-known minor alkaloid of coca, catalogued as part of the nineteenth- and twentieth-century characterisation of the Erythroxylum tropanes that began with cocaine itself. Its modern definition rests on Rivier’s 1981 GC–MS analysis of cultivated Erythroxylum, which established that cocaine and cis- and trans-cinnamoylcocaine are the genuine endogenous leaf alkaloids (distinguishing them from solvent-derived breakdown products) and quantified them by stable-isotope dilution ^{1Reference 1Rivier L · 1981Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewingView study →}. Structurally it is the cinnamate ester of methylecgonine — cocaine’s benzoyl group replaced by a cinnamoyl group — which is why it co-elutes and co-processes with cocaine and generates related oxidation impurities ^{8Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →}.

There is no commercial manufacture of cinnamoylcocaine: it is not a product but an analyte, obtained as a natural constituent of coca or synthesised in reference quantities for forensic identification and structure confirmation ^{8Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →}. No extraction, isolation or preparation methods are given here.

Patents: not yet researched.

Toxicity & Safety

Cinnamoylcocaine carries a moderate flag on a class basis, not on dedicated data. It is a bona-fide cocaine-family tropane with demonstrated (if weaker) cocaine-like activity in vitro ^{4Reference 4Calligaro DO · 1987Central and peripheral cocaine receptorsView study →}, and it belongs to a controlled-substance context — so it is treated conservatively even though no isolate toxicology, no dose-response and no human safety dataset exist for it. Its documented role is analytical and scholarly; it is not consumed as an isolate, and any real-world exposure is incidental, as a trace component of coca leaf.

Safety at a Glance

⚠️ Moderate toxicity

• Not encountered as an isolate. Human exposure is incidental — a minor constituent of coca leaf — never a standalone product.
• Cocaine-family analogue. Shown to be a weaker cocaine-like ligand at the cocaine site and monoamine transporters in vitro; treated with cocaine-class caution ^{4Reference 4Calligaro DO · 1987Central and peripheral cocaine receptorsView study →}.
• No dedicated toxicology. No isolate safety, genotoxicity, reproductive or repeat-dose data exist; absence of findings is not evidence of safety.
• Controlled-substance context. A coca tropane alkaloid; handled and discussed only in a forensic/chemotaxonomic frame, not as a therapeutic.

Dosage

There is no dose. Cinnamoylcocaine is not used therapeutically, is not sold as a supplement or drug, and has no studied human dosing. It appears in people only incidentally, as a trace alkaloid of coca leaf, and in the laboratory only as a reference analyte for forensic and chemotaxonomic work ^{8,9Reference 8Casale JF et al. · 2007Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaineView study →Reference 9Rubio NC et al. · 2015Possibilities for discrimination between chewing of coca leaves and abuse of cocaine by hair analysis including hygrine, cuscohygrine, cinnamoylcocaine and cocaine metabolite/cocaine ratiosView study →}. None of these figures is a recommendation, and none constitute preparation or dosing guidance.

References

1. Rivier L (1981). Analysis of alkaloids in leaves of cultivated Erythroxylum and characterization of alkaline substances used during coca chewing. Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/7242114/
2. Hegnauer R (1981). Chemotaxonomy of Erythroxylaceae (including some ethnobotanical notes on Old World species). Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/7242111/
3. Novák M, Salemink CA, Khan I (1984). Biological activity of the alkaloids of Erythroxylum coca and Erythroxylum novogranatense. Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/6379304/
4. Calligaro DO, Eldefrawi ME (1987). Central and peripheral cocaine receptors. Journal of Pharmacology and Experimental Therapeutics. https://pubmed.ncbi.nlm.nih.gov/2822906/
5. Casale JF, Mallette JR, Jones LM (2014). Chemosystematic identification of fifteen new cocaine-bearing Erythroxylum cultigens grown in Colombia for illicit cocaine production. Forensic Science International. https://pubmed.ncbi.nlm.nih.gov/24561557/
6. Lurie IS, Moore JM, Cooper DA, Kram TC (1987). Analysis of manufacturing by-products and impurities in illicit cocaine via high-performance liquid chromatography and photodiode array detection. Journal of Chromatography. https://pubmed.ncbi.nlm.nih.gov/3693467/
7. Moore JM, Casale JF (1994). Determination and in-depth chromatographic analyses of alkaloids in South American and greenhouse-cultivated coca leaves. Journal of Chromatography A. https://pubmed.ncbi.nlm.nih.gov/8118557/
8. Casale JF, Hays PA, Toske SG, Berrier AL (2007). Four new illicit cocaine impurities from the oxidation of crude cocaine base: formation and characterization of the diastereomeric 2,3-dihydroxy-3-phenylpropionylecgonine methyl esters from cis- and trans-cinnamoylcocaine. Journal of Forensic Sciences. https://pubmed.ncbi.nlm.nih.gov/17553089/
9. Rubio NC, Hastedt M, Gonzalez J, Pragst F (2015). Possibilities for discrimination between chewing of coca leaves and abuse of cocaine by hair analysis including hygrine, cuscohygrine, cinnamoylcocaine and cocaine metabolite/cocaine ratios. International Journal of Legal Medicine. https://pubmed.ncbi.nlm.nih.gov/25138383/
10. Casale JF, Toske SG, Colley VL (2005). Alkaloid content of the seeds from Erythroxylum coca var. coca. Journal of Forensic Sciences. https://pubmed.ncbi.nlm.nih.gov/16382835/
11. Lociciro S, Hayoz P, Esseiva P, Dujourdy L, Besacier F, Margot P (2007). Cocaine profiling for strategic intelligence purposes, a cross-border project between France and Switzerland. Part I. Optimisation and harmonisation of the profiling method. Forensic Science International. https://pubmed.ncbi.nlm.nih.gov/16876353/

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