从七叶一枝花根茎中分离得到的三种新甾体皂苷。
Three new steroidal saponins from the rhizome of Paris polyphylla.
作者信息
Zhao Yu, Kang Li-Ping, Liu Yi-Xun, Zhao Yang, Xiong Cheng-Qi, Ma Bai-Ping, Dong Fang-Ting
机构信息
Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China.
出版信息
Magn Reson Chem. 2007 Sep;45(9):739-44. doi: 10.1002/mrc.2039.
A mixture of a pair of stereoisomeric new spirostanol saponins (1a and 1b) and a new cholestane saponin (2) were isolated from the rhizome of Paris pollyphylla Smith var. yunnanensis. Their structures were elucidated as (25R)-spirost-5-en-3beta, 7beta-diol-3-O-alpha-L-arabinofuranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (1a), (25R)-spirost-5-en-3beta, 7alpha-diol-3-O-alpha-L-arabinofuranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (1b) and 26-O-beta-D-glucopyranosyl-(25R)-Delta(5(6), 17(20))-dien-16, 22-dione-cholestan-3beta, 26-diol-3-O-alpha-L-arabinofuranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (2) by a combination of HR-ESI-MS, FAB-MS, 1D and 2D NMR techniques (including (1)H-NMR, (13)C-NMR, (1)H--(1)H COSY, HSQC, HMBC and NOESY).
从滇重楼根茎中分离出一对立体异构的新螺甾烷醇皂苷（1a和1b）和一种新的胆甾烷皂苷（2）的混合物。通过高分辨电喷雾电离质谱（HR-ESI-MS）、快原子轰击质谱（FAB-MS）、一维和二维核磁共振技术（包括氢核磁共振（¹H-NMR）、碳核磁共振（¹³C-NMR）、氢-氢化学位移相关谱（¹H-¹H COSY）、异核单量子相干谱（HSQC）、异核多键相关谱（HMBC）和核Overhauser效应谱（NOESY））相结合的方法，确定它们的结构分别为（25R）-螺甾-5-烯-3β，7β-二醇-3-O-α-L-阿拉伯呋喃糖基-（1→4）-[α-L-鼠李吡喃糖基-（1→2）]-β-D-葡萄糖吡喃糖苷（1a）、（25R）-螺甾-5-烯-3β，7α-二醇-3-O-α-L-阿拉伯呋喃糖基-（1→4）-[α-L-鼠李吡喃糖基-（1→2）]-β-D-葡萄糖吡喃糖苷（1b）和26-O-β-D-葡萄糖吡喃糖基-（25R）-Δ⁵⁽⁶⁾，¹⁷⁽²⁰⁾-二烯-16，22-二酮-胆甾烷-3β，26-二醇-3-O-α-L-阿拉伯呋喃糖基-（1→4）-[α-L-鼠李吡喃糖基-（1→2）]-β-D-葡萄糖吡喃糖苷（2）。
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