摘要 从Dreea sinensis var. 干燥的根茎中分离得到一种新的孕烷苷酯,dreeoside。corrugata 根据化学反应和光谱证据,其结构确定为 12-O-benzoyl-drevogenin-3-O-β-d-oleandropyranosyl(1 →4)-O-β-d-cymaropyranosyl(1 →4 )- O -β- d -cymaropyranoside。
摘要 从Dreea sinensis var. 干燥的根茎中分离得到一种新的孕烷苷酯,dreeoside。corrugata 根据化学反应和光谱证据,其结构确定为 12-O-benzoyl-drevogenin-3-O-β-d-oleandropyranosyl(1 →4)-O-β-d-cymaropyranosyl(1 →4 )- O -β- d -cymaropyranoside。
Activity-guided fractionation of the stems of Marsdenia tenacissima led to the isolation of five new pregnane glycosides, namely marstenacissides E (1), F (2), G (3), H (4), and I (5). Their structures were determined on the basis of 1H and 13C NMR, COSY, TOCSY, ROESY, and FABMS experiments.