Compound Monograph
Calein B
Calein B is a sesquiterpene lactone isolated from Calea species ("bitter grass"), closely related to calein A.
Classification
Calein B 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 B is a naturally occurring sesquiterpene lactone, found in Bitter grass.
Research & Evidence
Calein B is a sesquiterpene lactone isolated from Calea species (“bitter grass”), structurally a close isomer of calein A. As with the related caleins, little beyond its isolation and structure from these plants has been established.