CUCURBITACINS AS CONSTITUENTS OF WILBRANDIA-EBRACTEATA
CUCURBITACINS AS CONSTITUENTS OF WILBRANDIA-EBRACTEATA
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DOI：
10.1055/s-2006-959668
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发表时间：
1993-06-01
期刊：
影响因子：
2.7
通讯作者：
RUCKER, G
中科院分区：
文献类型：
--
作者：
FARIAS, MR;SCHENKEL, EP;RUCKER, G
除了已知的二氢葫芦素 B 和 E、二氢异葫芦素 B、葫芦素 B、D、E、G、H、P 和 22-脱氧葫芦素 D 之外，Wilbrandia ebracteata 根的甲醇提取物还提供了四种新化合物，其结构被阐明为(20R,24xi)-3β,16α,20,24,25-五氢-xy-10α-葫芦-5-烯-2,11,22-三酮(3-表-异葫芦素G) (8), (20R,22xi)-2β,16α,20,22,25-五氢-xy-10α-葫芦-5,23t-二烯-3,11-二酮(13),(20R)-25-乙酰氧基-3,16a,20-三羟基-30-正-2-(β-D-葡萄糖-雷诺酰氧基)-1,2,3,4,5, 10-脱氢葫芦-6-烯-11,22-二酮 (14) 和二氢异葫芦素 B-3-葡萄糖苷 (16)。
The methanolic extract from the roots of Wilbrandia ebracteata afforded, in addition to the known dihydrocucurbitacins B and E, dihydroisocucurbitacin B, cucurbitacins B, D, E, G, H, P, and 22-deoxycucurbitacin D, four new compounds whose structures were elucidated as (20R,24xi)-3beta,16alpha,20,24,25-pentahydro-xy-10alpha-cucurbit-5-ene-2,11,22-trione (3-epi-isocucurbitacin G) (8), (20R,22xi)-2beta,16alpha,20,22,25-pentahydro-xy-10alpha-cucurbita-5,23t-diene-3,11-dione (13), (20R)-25-acetoxy-3,16a,20-trihydroxy-30-nor-2-(beta-D-glucopy-ranosyloxy)-1,2,3,4,5, 10-dehydrocucurbit-6-ene-11,22-dione (14), and dihydroisocucurbitacin B-3-glucoside (16).