来自绿菟葵叶片的呋甾烷醇皂苷和槲皮素糖苷
Furostanol saponins and quercetin glycosides from the leaves of Helleborus viridis L.
作者信息
Braca Alessandra, Prieto Josè Maria, De Tommasi Nunziatina, Tomè Franca, Morelli Ivano
机构信息
Dipartimento di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy.
出版信息
Phytochemistry. 2004 Nov;65(21):2921-8. doi: 10.1016/j.phytochem.2004.07.013.
Phytochemical analysis of the polar extracts of the leaves of Helleborus viridis (Ranunculaceae) resulted in the isolation of two new furostanol saponins (25R)-26-[(alpha-L-rhamnopyranosyl)oxy]-22alpha-methoxyfurost-5-en-3beta-yl O-beta-D-glucopyranosyl-(1-->3)-O-[6-acetyl-beta-D-glucopyranosyl-(1-->3)]-O-beta-D-glucopyranoside (1) and (25R)-26-[(alpha-L-rhamnopyranosyl)oxy]-22alpha-methoxyfurost-5-en-3beta-yl O-beta-D-glucopyranosyl-(1-->3)-O-beta-D-glucopyranosyl-(1-->3)-O-beta-D-glucopyranoside (2) and three new quercetin glycosides, quercetin 3-O-(2-E-caffeoyl)-alpha-L-arabinopyranosyl-(1-->2)-beta-D-galactopyranoside-7-O-beta-d-glucopyranoside (3), quercetin 3-O-(2-E-caffeoyl)-alpha-L-arabinopyranosyl-(1-->2)-beta-D-galactopyranoside (4), and quercetin 3-O-alpha-L-arabinopyranosyl-(1-->2)-beta-D-galactopyranoside (5). The structures of the new compounds were determined by spectroscopic analysis, including 2D NMR data and mass spectrometry.
对绿菟葵（毛茛科）叶片的极性提取物进行植物化学分析，结果分离出两种新的呋甾烷醇皂苷，即(25R)-26-[(α-L-鼠李吡喃糖基)氧基]-22α-甲氧基呋甾-5-烯-3β-基 O-β-D-吡喃葡萄糖基-(1→3)-O-[6-乙酰基-β-D-吡喃葡萄糖基-(1→3)]-O-β-D-吡喃葡萄糖苷（1）和(25R)-26-[(α-L-鼠李吡喃糖基)氧基]-22α-甲氧基呋甾-5-烯-3β-基 O-β-D-吡喃葡萄糖基-(1→3)-O-β-D-吡喃葡萄糖基-(1→3)-O-β-D-吡喃葡萄糖苷（2），以及三种新的槲皮素糖苷，即槲皮素 3-O-(2-E-咖啡酰基)-α-L-阿拉伯吡喃糖基-(1→2)-β-D-吡喃半乳糖苷-7-O-β-D-吡喃葡萄糖苷（3）、槲皮素 3-O-(2-E-咖啡酰基)-α-L-阿拉伯吡喃糖基-(1→2)-β-D-吡喃半乳糖苷（4）和槲皮素 3-O-α-L-阿拉伯吡喃糖基-(1→2)-β-D-吡喃半乳糖苷（5）。通过光谱分析，包括二维核磁共振数据和质谱，确定了这些新化合物的结构。
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