Isolation of methyl 27-caffeoyloxyoleanolate--a new oleanane Triterpenoid from the roots of Hibiscus vitifolius.

A new oleanane triterpenoid, methyl 27-caffeoyloxyoleanolate (2), together with eight known compounds viz. oleanolic acid, kaempferol, quercetin, beta-sitosterol-3-O-beta-D-glucopyranoside, kaempferol-3-O-alpha-D-rhamnopyranoside, gossypin, quercetin-3-O-beta-D-glucopyranoside and mangiferin were isolated from the ethanol extract of roots of Hibiscus vitifolius Linn. The structure of the new compound 2 was elucidated from spectroscopic, ESI-MS and physical data. The eight known compounds were identified by comparison of their physical and spectroscopic data with those reported in the literature.