The chromatographic separation of aqueous methanolic extract of Calendula officinalis led to the isolation of a new eudesmane sesquiterpene glycoside (1), together with tow known compounds, a lupane ester (2) and flavonoide gulcoside (3). Their structures were characterized to be 1β,3β,6α,8α,tetrahydroxyeudesm-4-ene 11-O-β-D-glucopyrnoside (1), 3β-E-caffoeyl lupeol (2), kaempferol-3-O-gulcoside (3) by spectroscopic means.
International Journal of Pharmacology, Phytochemistry and Ethnomedicine (Volume 3)
M. W. Mohammad Sadaka "A Novel Eudesmane Glycosides Sesquiterpene from Calendulaofficinalis L.", International Journal of Pharmacology, Phytochemistry and Ethnomedicine, Vol. 3, pp. 39-45, 2016