Novel diterpenoids and diterpenoid glycosides from Siegesbeckia orientalis

Novel diterpenoids and diterpenoid glycosides from Siegesbeckia orientalis
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DOI:
10.1021/np0400407
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发表时间:
2004-09-01
影响因子:
5.1
通讯作者:
Yue, JM
Yue, JM
中科院分区:
生物学2区
文献类型:
--
作者:
Xiang, Y;Zhang, H;Yue, JM

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八种新的对映-海松烷型二萜和二萜苷,即对映-12 α,16-环氧-2 β,15 α,19-三羟基海松-8-烯(1),对映-12 α,16-环氧-2 β,15 α,19-三羟基海松-8(14)-烯(2),对映-2 α,15,16,19-四羟基海松-8(14)-烯(3),对映-15-氧代-2 β,16,19-三羟基匹马-8(14)-烯(4)、对映-2-氧代-15,16-二羟基匹马-8(14)-烯-16-O-β-吡喃葡萄糖苷(5)、对映-2-氧代-15,16,19-三羟基匹马-8(14)-烯(6)、对映-2-氧代-3 β,15,16-三羟基匹马-8(14)-烯-3-O-β-吡喃葡萄糖苷(7)和对映-2 β,15,16,19-tetrahydroxypimar-8(14)-en-19-O-beta-glucopyranoside(9)和7个已知的二萜(8,10-15)从Siegesbeckia orientalis中分离得到。化合物1和2是具有前所未有的12 α,16-环氧基的新型对映海松烷二萜类化合物。通过波谱方法,特别是一维和二维核磁共振波谱方法确定了它们的结构。
Eight new ent-pimarane diterpenoids and diterpenoid glycosides, namely, ent-12alpha,16-epoxy-2beta,15alpha,19-trihydroxypimar-8-ene (1), ent-12alpha,16-epoxy-2beta,15alpha,19-trihydroxypimar-8(14)-ene (2), ent-2alpha,15,16,19-tetrahydroxypimar-8(14)-ene (3), ent-15-oxo-2beta,16,19-trihydroxypimar-8(14)-ene (4), ent-2-oxo-15,16-dihydroxypimar-8(14)-en-16-O-beta-glucopyranoside (5), ent-2-oxo-15,16,19-trihydroxypimar-8(14)-ene (6), ent-2-oxo-3beta,15,16-trihydroxypimar-8(14)-en-3-O-beta-glucopyranoside (7), and ent-2beta,15,16,19-tetrahydroxypimar-8(14)-en-19-O-beta-glucopyranoside (9), together with seven known diterpenes (8, 10-15) were isolated from Siegesbeckia orientalis. Compounds 1 and 2 are novel ent-pimarane diterpenoids with an unprecedented 12alpha,16-epoxy group. Their structures were established by spectral methods, especially 1D and 2D NMR spectral methods.