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抗甜味天然产物。XI. 来自琉球络石日本变种的西塔基糖苷VI-X的结构。

Antisweet natural products. XI. Structures of sitakisosides VI-X from Stephanotis lutchuensis Koidz. var. japonica.

作者信息

Yoshikawa K, Taninaka H, Kan Y, Arihara S

机构信息

Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Japan.

出版信息

Chem Pharm Bull (Tokyo). 1994 Dec;42(12):2455-60. doi: 10.1248/cpb.42.2455.

DOI:10.1248/cpb.42.2455
PMID:7697761
Abstract

From the fresh stem of Stephanotis lutchuensis var. japonica, five new oleanane-type triterpenoid glycosides named sitakisosides VI-X (1-5) were isolated. Their structures were determined on the basis of spectroscopic data and chemical evidence. Sitakisosides VI and VII are 3-O-beta-D-xylopyranosyl(1-->6)-beta-D-glucopyranosyl(1-->6)-beta-D- glucopyranosido-21-O-(6-N-methylanthranilyl)-beta-D-glucopyr anosyl and 3-O-beta-D-xylopyranosyl(1-->6)-beta-D-glucopyranosyl(1-->6)-beta-D- glucopyranosido-21-O-(4-N-methylanthranilyl)-beta-D-glucopyr anosyl sitakisogenin, respectively. Sitakisoside VIII is 3-O-beta-D-xylopyranosyl(1-->6)-beta-D- glucopyranosyl(1-->6)-beta-D-glucopyranosido-21-O-N-methylanthr anilyl- 3 beta,16 beta,21 beta,28-tetrahydroxyolean-12-ene-22-one. Sitakisoside IX is 3-O-beta-D-xylopyranosyl(1-->6)-beta-D-glucopyranosyl(1-->6)-beta-D- glucopyranosido-21-O-(6-N-methylanthranilyl)-beta-D-glucopyr anosyl gymnestrogenin. Sitakisoside X is 3-O-beta-D-xylopyranosyl(1-->6)-beta-D- glucopyranosyl(1-->6)-beta-D-glucopyranosyl longispinogenin.

摘要

从琉球群岛络石新鲜茎中,分离得到了5个新的齐墩果烷型三萜糖苷,命名为喜之岛糖苷VI - X(1 - 5)。它们的结构通过光谱数据和化学证据得以确定。喜之岛糖苷VI和VII分别是3 - O - β - D - 吡喃木糖基(1→6) - β - D - 吡喃葡萄糖基(1→6) - β - D - 吡喃葡萄糖苷 - 21 - O - (6 - N - 甲基邻氨基苯甲酰基) - β - D - 吡喃葡萄糖基和3 - O - β - D - 吡喃木糖基(1→6) - β - D - 吡喃葡萄糖基(1→6) - β - D - 吡喃葡萄糖苷 - 21 - O - (4 - N - 甲基邻氨基苯甲酰基) - β - D - 吡喃葡萄糖基喜之岛皂苷元。喜之岛糖苷VIII是3 - O - β - D - 吡喃木糖基(1→6) - β - D - 吡喃葡萄糖基(1→6) - β - D - 吡喃葡萄糖苷 - 21 - O - N - 甲基邻氨基苯甲酰基 - 3β,16β,21β,28 - 四羟基齐墩果 - 12 - 烯 - 22 - 酮。喜之岛糖苷IX是3 - O - β - D - 吡喃木糖基(1→6) - β - D - 吡喃葡萄糖基(1→6) - β - D - 吡喃葡萄糖苷 - 21 - O - (6 - N - 甲基邻氨基苯甲酰基) - β - D - 吡喃葡萄糖基裸柱草皂苷元。喜之岛糖苷X是3 - O - β - D - 吡喃木糖基(1→6) - β - D - 吡喃葡萄糖基(1→6) - β - D - 吡喃葡萄糖基长刺皂苷元。

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