5-Lipoxygenase inhibitors isolated from Gardeniae Fructus.
作者:MAKOTO NISHIZAWA、RURIKO IZUHARA、KO KANEKO、YASUKO KOSHIHARA、YASUO FUJIMOTO
DOI:10.1248/cpb.36.87
日期:——
Five 5-lipoxygenase inhibitors, chlorogenic acid (1), 6''-p-coumaroyl genipin gentiobioside (2), 3, 4-di-O-caffeoylquinic acid (3), 3-O-caffeoyl-4-O-sinapoylquinic acid (4) and 3, 5-di-O-caffeoyl-4-O-(3-hydroxy-3-methyl)glutaroylquinic acid (5), were isolated from Gardeniae Fructus. The structures of the new compounds (2, 4 and 5) were elucidated on the basis of spectral data and chemical evidence. These hydroxycinnamic acid derivatives inhibit 5-lipoxygenase activity, and 3 was the most potent inhibitor. The inhibitory effects were enhanced on methylation of the carboxyl group(s) of 1, 3, 4 and 5, and the ID<50> values of the methyl esters of 3, 4 and 5 were of the order of 10<-8>M.
从栀子果实中分离出五种5-脂氧合酶抑制剂,分别为绿原酸(1)、6''-对香豆酰基京尼平龙胆二糖苷(2)、3,4-二-O-咖啡酰基奎宁酸(3)、3-O-咖啡酰基-4-O-芥子酰基奎宁酸(4)和3,5-二-O-咖啡酰基-4-O-(3-羟基-3-甲基)戊二酰基奎宁酸(5)。根据光谱数据和化学证据,新化合物(2、4和5)的结构得到阐明。这些羟基肉桂酸衍生物能抑制5-脂氧合酶活性,其中3是最强的抑制剂。对1、3、4和5的羧基进行甲基化增强了抑制效果,3、4和5的甲酯的ID<50>值约为10<−8>M。