New saponins from Mangifera indica.
Khan M. N. I., Nizami S. S., Khan M. A., Zaheer Ahmed
Author Affiliation: H.E.J. Research Institute of Chemistry, University of Karachi, Karachi 75270, Pakistan.
Journal of Natural Products 56 : 767-770
Abstract : Two new terpenoidal saponins, indicosides A and B, were isolated from the MeOH extract of dried stem bark of M. indica (collected from Karachi, Pakistan). Their structures were determined as 28-hydroxylupa-12,20(29)-diene-3-O-[?-glucopyranosyl-(1->2)][?-glucopyranosyl-(1->3)]-?-L-arabinopyranoside, and 28-hydroxylupa-12,20(29)-diene-3-O-[?-glucopyranosyl-(1->3)-?-L-rhamnopyranosyl-(1->2)][?glucopyranosyl(1->3)]-?-L-arabinopyranoside, on the basis of chemical and spectroscopic studies.