We screened myoga extracts for inhibitors of human platelet aggregation and human 5-lipoxygenase. We identified a novel labdane type of diterpene, together with three known diterpenes (miogadial and galanals A and B) from the flower buds of myoga. Spectroscopic data indicated the structure of the new compound to be 12(E)-labdene-15,16,(8β)17-trial (miogatrial). Miogatrial and miogadial were potent inhibitors of human platelet aggregation and human 5-lipoxygenase (5-LOX). The sesquiterpene, polygodial, also exhibited strong inhibitory activity against human platelet aggregation and 5-LOX. On the other hand, galanals A and B did not have inhibitory activity in either experimental system. It thus appears that a 3-formyl-3-butenal structure was essential for the potent inhibition of human platelet aggregation and human 5-LOX.
我们对桃花心木
提取物进行了筛选,以寻找人体血小板聚集
抑制剂和人体 5-脂氧合酶
抑制剂。我们从桃花心木的花蕾中发现了一种新型拉布旦类二萜,以及三种已知的二萜(miogadial 和 galanals A 和 B)。光谱数据表明,新化合物的结构是 12(E)-labdene-15,16,(8β)17-trial (miogatrial)。Miogatrial 和 miogadial 是人体血小板聚集和人体 5-脂氧合酶(5-LOX)的强效
抑制剂。
倍半萜类化合物 polygodial 对人体血小板聚集和 5-LOX 也有很强的抑制作用。另一方面,伽蓝醛 A 和 B 在两种实验系统中都没有抑制活性。由此看来,3-甲酰基-
3-丁烯醛结构是有效抑制人体血小板聚集和人体 5-LOX 的必要条件。