【作者】 滕荣伟； 陈昌祥； 王德祖； 倪伟；

【Author】 Rongwei TENG Changxiang CHEN~* Dezu WANG Wei Ni (Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,650204

【机构】 中国科学院昆明植物研究所植物化学研究室；

【摘要】 从滇皂角(Gledistsia dolavayi Franch．)中分离得到两个新的三萜皂甙和一个已知三萜皂甙 GS-C′(1)。运用1D和2D NMR 技术,尤其是 HMQC-TOCSY,推定了这两个新皂甙的结构并全归属它们的 NMR 氢、碳信号,分别命名为 Gleditsia saponin J(GS-J)(2)和 Gleditsia saponin(GS-K)(3)。GS-J 和 GS-K 是带有一个单萜酰基的刺囊酸3,28-O-双糖链皂甙,但具有不同的单萜酰基。更多还原

【Abstract】 Two new triterpenoid saponins that were isolated from Gledistsia dolavayi Franch. were characterized as 3,28-O-bisglycosides of echinocystic acid acylated with monoterpene carboxylic acids.On the basis of spectroscopic data,their structures were elucidated as echinocystic acid-3-O-[β-D-xylopyranosyl（1→2）-α-L-arabinospyranosyl（1→6）-β-D- glucopyrano-side]-28-O-{β-D-xylopyranosyl（1→3）-β-D-xylopyranosyl（1→4）-[β-D- galactopyranosyl（1→2）]-α-L-rhamnopyranosyl（1→2）}-[6-O-（6S）-2-trans-2,6-dimethyl-2,7- octadienoyl]-β-D-glucopyranoside,named Gleditsia saponin J（GS-J）（2）,and echinocystic acid-3- O-[β-D-xylopyranosyl（1→2）-α-L-arabinospyranosyl（1→6）-β-D-glucopyranoside]-28-O-{β-D- xylopyranosyl（1→3）-β-D-xylopyranosyl（1→4）-[β-D-galactopyranosyl（1→2）]-α-L-rhamno- pyranosyl（1→2）}-[6-O-（6S）-2-trans-6-methyl-2,7-dien-6,9-octadioyl]-β-D-glucopyranoside, named Gloditsia saponin K（GS-K）（3）respectively.A known saponin GS-C’（1）was also obtained, but firstly as a natural product.The complete ¹H and ¹³C assignments of saponin 1-3 were given in this paper.更多还原