Novel sesquiterpenoids from Siegesbeckia orientalis
Novel sesquiterpenoids from Siegesbeckia orientalis
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DOI:
10.1002/hlca.200490290
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发表时间:
2005-01-01
影响因子:
1.8
通讯作者:
Yue, JM
中科院分区:
文献类型:
--
作者:
Xiang, Y;Fan, CQ;Yue, JM
Five new sesquiterpenoids, namely, 8beta-(angeloyloxy)-4beta,6alpha,15-trihydroxy-14-oxoguaia-9,11(13)-dien-12-oic acid 12,6-lactone (1), 4beta,6alpha,15-trihydroxy-8beta-(isobutyryloxy)-14-oxoguaia-9,11(13)-dien-12-oic acid 12,6-lactone (2), 11,12,13-trinorguai-6-ene-4beta,10beta-diol (3), (1(10)E,4E,8Z)-8-(angeloyloxy)-6alpha,15-dihydroxy-14-oxogermacra-(1(10),4,8,11(13)-tetraen-12-oic acid 12,6-lactone (9), and (1(10)E,4beta)-8beta-(angeloyloxy)-6alpha,14,15-trihydroxygermacra-1(10),11(13)-dien-12-oic acid 12,6-tactone (11), and three new artifacts, (1(10)E,4Z)-8beta-(angeloyloxy)-9alpha-ethoxy-6alpha,15-dihydroxy-14-oxogermacra-1(10),4,11(13)-trien-12-oic acid 12,6-lactone (6), (1(10)E,4Z)-8beta-(angeloyloxy)-9alpha,13-diethoxy-6alpha,15-dihydroxy-14-oxogermacra-1(10),4-dien-12-oic acid 12,6-lactone (7), and (1(10)E,4Z)-8beta-(angeloyloxy)-9alpha-ethoxy-6alpha,15-dihydroxy-13-methoxy-14-oxogermacra-1(10),4-dien-12-oic acid 12,6-lactone (8), together with the three known sesquiterpenoids 4, 5, and 10, were isolated from the aerial parts of Siegesbeckia orientalis L. Their structures were established by spectral methods, especially 1D- and 2D-NMR spectral methods.