TWO NEW CYCLOARTANE TRITERPENE GLYCOSIDES AND A NEW ALKALOID FROM SOULIEA VAGINATA

摘要

Chemical investigation on the rhizome of Souliea vaginata resulted in the isolation of two new cycloartane triterpene glycosides and a new alkaloid,soulieosides D and E,and soulieotine (1-3),and their structures were elucidated on the basis of extensive NMR spectral experiments and chemical methods as (20S,22R,23S,24R)-16beta:23;22:25-diepoxy-3beta,24-dihydroxy-23-methoxy-9,19-cyclolanostane-3-O-beta-D-(4-acetyl)xylopyranoside (1),(20S,22R,23S,24R)-16beta:23;22:25-diepoxy-3beta,23,24-trihydroxy-9,19-cyclolanostane-3-O-beta-D-(3-acet yl)xylopyranoside (2),E-3-(3'-methyl-2'-butenylidene)-6-methoxy-2-indolinone (3).