New steroid saponins from the seeds of Allium tuberosum L.

被引:38
作者
Sang, SM
Mao, SL
Lao, AN [1 ]
Chen, ZL
Ho, CT
机构
[1] Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Mat Med, Shanghai 200031, Peoples R China
[2] Rutgers State Univ, Dept Food Sci, New Brunswick, NJ 08901 USA
关键词
Allium tuberosum; Liliaceae; steroid saponins; tuberosides N-U;
D O I
10.1016/S0308-8146(03)00131-6
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Eight new steroidal saponins, including four spirostanol, three furostanol and one cholesterol saponin, have been isolated from the seeds of Allium tuberosum. On the basis of acid hydrolysis and comprehensive spectroscopic analyses, their structures were established as tuberoside N, (25S)-5beta-spirostan-2beta, 3beta-diol 3-O-beta-D-glucopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl (1-->4)]-beta-D-glucopyranoside; tuberoside O, (25S)-5beta-spirostan-2beta, 3beta, 5-triol 3-O-beta-D-glucopyranoside; tuberoside P, (25S)-5beta-spirostan-2beta, 3beta, 5-triol 3-O-alpha-L-rhamnopyranosyl (1-->4)-beta-D-glucopyranoside; tuberoside Q, (24S, 25S)-5beta-spirostan-2beta, 3beta, 5,24-tetraol 3-O-alpha-L-rhamnopyranosyl (1-->4)-beta-D-glucopyranoside; tuberoside R, 26-O-beta-D-glucopyranosyl-(25S)-5beta-furost-20(22)-ene-2beta, 3beta, 5, 26-tetraol 3-O-beta-D-glucopyranoside; tuberoside S, 26-O-beta-D-glucopyranosyl-(25S)-5beta-furost-20(22)-ene-3beta, 26-diol 3-O-beta-D-glucopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl (1-->4)]-beta-D-glucopyranoside; tuberoside T, 26-O-beta-D-glucopyranosyl-(25S)-5alpha-furost-20(22)-ene-3beta, 26-diol 3-O-alpha-L-rhamnopyranosyl (1-->2)-[alpha-L-rhamnopyranosyl (1-->4)]-beta-D-glucopyranoside and tuberoside U, 16-O-beta-D-glucopyranosyi-(22S, 25S)-cholest5-ene-3beta, 16beta, 22, 26-tetraol 3-O-alpha-L-rhamnopyranosyl (1-->2)-[alpha-L-rhamnopyranosyl (1-->4)]-beta-D-glucopyranoside, respectively. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:499 / 506
页数:8
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