title: Yemuoside YM7, YM11, YM13, and YM14: Four Nortriterpenoid Saponins from Stauntonia chinensis.
abstract: Four new nortriterpenoid saponins, named yemuoside YM (7) ( 1), YM (11) ( 2), YM (13) ( 3), and YM (14) ( 4), were isolated from STAUNTONIA CHINENSIS Decne. A new prosaponin, named yemuoside YM (16) ( 5), was isolated from the cleavage of the ester-glycoside linkage of 1. On the basis of chemical and physicochemical evidence, their structures were elucidated.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, People's Republic of China.
authors.forename: H B
authors.initials: HB
authors.lastname: Wang
authors.forename: D Q
authors.initials: DQ
authors.lastname: Yu
authors.forename: X T
authors.initials: XT
authors.lastname: Liang
authors.forename: N
authors.initials: N
authors.lastname: Watanabe
authors.forename: M
authors.initials: M
authors.lastname: Tamai
authors.forename: S
authors.initials: S
authors.lastname: Omura