Compound Monograph
Calein A
Calein A is a sesquiterpene lactone isolated from Calea species ("bitter grass").
Classification
Calein A is a sesquiterpene lactone, part of the terpenoids class. The largest class of plant compounds, built from five-carbon isoprene units — the essential-oil aromatics, resins, bitter principles, saponins, and plant sterols.
Where Does It Come From? (1)
Calein A is a naturally occurring sesquiterpene lactone, found in Bitter grass.
Research & Evidence
Calein A is a sesquiterpene lactone (a germacranolide-type compound) isolated from Calea species, the group of “bitter grass” plants. Beyond its identification and structural characterisation from these plants, little is established about its biological activity.