New steroidal glycosides from the rhizome of Anemarrhena asphodeloides

New steroidal glycosides from the rhizome of Anemarrhena asphodeloides
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知母根茎中的新甾体苷

DOI:
10.1080/10286020.2014.942658
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发表时间:
2014-09
影响因子:
1.7
通讯作者:
马百平
马百平
中科院分区:
医学4区
文献类型:
--
作者:
庞旭;赵阳;熊呈琦;马百平

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本文报道从知母根茎中分得两个新的甾体皂苷类化合物,即知母皂苷X(1)和知母皂苷Y(2),以及一个新的甾烷苷类化合物,即知母烷B(3),并首次从该植物中分得三个已知化合物:25 S-知母皂苷BII(4),protodesgalactotigonin(5)和知母皂苷BII-a(6)。通过1D、2D NMR、MS等波谱分析,确定了新化合物的结构为:26-O-β-d-吡喃葡萄糖基-(25 S)-5β-22-甲氧基-呋甾-3 β,26-二醇3-O-β-d-吡喃葡萄糖基-(1 → 2)-α-l-吡喃阿拉伯糖苷(1),5β-拟螺甾-3 β,15 α,23α-三醇3-O-β-d-吡喃葡萄糖基-(1 → 2)-β-d-吡喃半乳糖苷(2),(5β,17 α)-Δ16(17)-20-酮-孕甾-2 β,3 β-二醇3-O-β-d-吡喃葡萄糖基-(1 → 2)-β-d-吡喃半乳糖苷(3)。
Two new steroidal saponins, timosaponin X (1) and timosaponin Y (2), and one new pregnane glycoside, timopregnane B (3), were isolated from the rhizomes of Anemarrhena asphodeloides, as well as three known compounds 25S-timosaponin BII (4), protodesgalactotigonin (5), and timosaponin BII-a (6) isolated from this plant for the first time. By the detailed analysis of 1D, 2D NMR, MS spectra, and chemical evidences, the structures of new compounds were elucidated as 26-O-β-d-glucopyranosyl-(25S)-5β-22-methoxy-furost-3β,26-diol 3-O-β-d-glucopyranosyl-(1 → 2)-α-l-arabinopyranoside (1), 5β-pseudo-spirost-3β,15α,23α-triol 3-O-β-d-glucopyranosyl-(1 → 2)-β-d-galactopyranoside (2), (5β,17α)-Δ16(17)-20-one-pregn-2β,3β-diol 3-O-β-d-glucopyranosyl-(1 → 2)-β-d-galactopyranoside (3).
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