Antimicrobial flavonoids from Psiadia trinervia and their methylated and acetylated derivatives
作者:Ying Wang、Matthias Hamburger、Joseph Gueho、Kurt Hostettmann
DOI:10.1016/s0031-9422(00)97976-7
日期:1989.1
Abstract From a dichloromethane extract and a hydrolysed methanolic extract from the leaves of Psiadia trinervia, 13 3-methylated flavonols have been isolated. Their structures were established by the usual spectroscopic methods (UV, EIMS, 1H and 13C NMR). Ayanin, casticin, chrysosplenol-D and 5,7,4′-trihydroxy-3,8-dimethoxyfiavone were responsible for the antifungal activity found in the preliminary
摘要 从三叶蕨叶的二氯甲烷提取物和水解甲醇提取物中分离出 13 种 3-甲基化黄酮醇。它们的结构是通过通常的光谱方法(UV、EIMS、1H 和 13C NMR)确定的。Ayanin、casticin、chrysosplenol-D 和 5,7,4'-三羟基-3,8-二甲氧基黄酮负责在初步筛选中发现的抗真菌活性。Chrysosplenol-D、isokaempferide、5,7,4'-三羟基-3,3'-二甲氧基黄酮和 5,7,4'-三羟基-3,8-二甲氧基黄酮显示出抗菌活性。通过全甲基化和选择性甲基化 C-5 处的游离羟基制备了 29 种衍生物。使用 C. cucumerinum 和 B. cereus 作为测试生物,通过生物自显影测定法测定分离物和衍生物的抗微生物活性。