SEARCH Articles Figures Tables D:A-friedo-oleananes De-A-oleanane Germanicanes, Taraxastanes, Oleananes, and Ursanes Kokoona zeylanica D:A-friedo oleananes from Of oleanane triterpenoid Of oleanane triterpenoids Oleanane Group Oleanane saponins Oleanane triterpenes Oleanane triterpenoids Oleanane, structure Oleanane-type saponins Oleanane-type triterpene saponins Oleanane-type triterpenes Oleananes Zahna africana oleanane saponins from