Flavonoid Glycosides from <i>Siparuna gigantotepala</i> Leaves and Their Antioxidant Activity
作者:Harlen Gerardo Torres Castañeda、Ana Julia Colmenares Dulcey、José Hipólito Isaza Martínez
DOI:10.1248/cpb.c15-00788
日期:——
de (5), and three flavonol aglycones, quercetin (6), kaempferol 3,7-dimethyl ether (7), and kaempferol 3,7,4'-trimethyl ether (8), were also isolated and are reported here for the first time in this species. The structures of compounds 1 and 2 were established on the basis of their LC-MS and one- and two-dimensional (1D)- and (2D)-NMR spectroscopic analyses, combined with acid methanolysis and silylation
从巨大无花果Siparuna gigantotepala的叶子中分离出两种新的黄酮醇苷。确定其结构为山ka酚3-O-β-吡喃吡喃糖基-(1→2)-α-阿拉伯呋喃糖苷(1)和山ka酚3,7-二-O-甲基-4'-O-α-鼠李糖吡喃糖基-(1 →2)-β-吡喃葡萄糖苷(2)。此外,三种已知的黄酮醇苷,芦丁(3),山ka酚3-O-芸香苷(4)和山and酚3,7-二-O-甲基-4'-O-芸苔苷(5)和三种黄酮苷元,还分离了槲皮素(6),山3酚3,7-二甲醚(7)和山3酚3,7,4'-三甲基醚(8),并首次在此物种中报道。化合物1和2的结构是基于它们的LC-MS以及一维和二维(1D)和(2D)-NMR光谱分析,结合酸性甲醇分解法和糖部分的甲硅烷基化而建立的,用于GC-MS 。