A novel dimeric flavonol glycoside from <i>Cynanchum acutum</i> subsp. <i>sibiricum</i>
作者:Si-Wen Yuan、Wei Dai、Xin-Hui Pan、Yan Lu、Dao-Feng Chen、Qi Wang
DOI:10.1080/14786419.2018.1483931
日期:2019.7.18
A novel dimeric flavonol glycoside, Cynanflavoside A (1), together with six analogues, kaempferol-3-O-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside (2), quercetin-3-O-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside (3), kaempferol-3-O-α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranoside (4), quercetin-3-O-α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranoside (5), kaempferol-3-O-β-D-glucopyranosyl-7-O-α-L-rhamnopyranoside
一种新颖的二聚黄酮醇苷,Cynanflavoside A(1),具有六个类似物,山柰酚-3-一起ø - α -L-鼠李糖- (1→2) - β -D-吡喃葡糖苷(2),槲皮素-3- ø - α -L-鼠李糖- (1→2) - β -D-吡喃葡糖苷(3),山柰酚-3- ø - α -L-鼠李糖- (1→2) - β -D-吡喃木糖苷(4),槲皮素3 - O - α -L-鼠李吡喃糖基- (1→2)-β-D-吡喃吡喃糖苷(5),山萘酚-3- O - β-D-吡喃葡萄糖基-7- ø - α -L吡喃鼠李糖苷(6),槲皮素-3- Ö半乳糖苷(7)从分离Ñ的丁基醇提取牛心藓亚种。西伯利亚。通过光谱确定其结构,并与先前报道的光谱数据进行比较。评估了所有化合物的体外抗补体活性,只有化合物5表现出抗补体作用,CH 50值为0.33 mM。