Five New Labdane-Type Diterpenes from Excoecaria agallocha. IV.
作者:Tenji KONISHI、Yasuhiro FUJIWARA、Takao KONOSHIMA、Shiu KIYOSAWA
DOI:10.1248/cpb.46.1393
日期:——
Five new labdane-type diterpenes were isolated from the resinous wood of Excoecaria agallocha. The structures of these compounds were established as ent-13-epi-8, 13-epoxy-2-hydroxylabda-1, 14-dien-3-one (1), ent-13-epi-8, 13-epoxy-14S, 15-dohydroxylabdan-3-one (2), ent-13-epi-8, 13-epoxy-2, 3-secolabd-14-ene-2, 3-dioic acid (3), ent-13-epi-8, 13-epoxy-2, 3-secolabd-14-ene-2, 3-dioic acid 3-methyl ester (4) and ent-13-epi-8, 13-epoxy-2-oxa-3-oxolabd-14-ene-1R-carboxylic acid (5).
从印度楝树脂木中分离出五种新的腊烷型二萜。这些化合物的结构被确定为ent-13-epi-8, 13-epoxy-2-hydroxylabda-1, 14-dien-3-one (1)、ent-13-epi-8, 13-epoxy-14S, 15-dohydroxylabdan-3-one (2)、ent-13-epi-8, 13-epoxy-2, 3-secolabd-14-ene-2, 3-dioic acid (3)、ent-13-epi-8, 13-epoxy-2, 3-secolabd-14-ene-2, 3-dioic acid 3-methyl ester (4)和ent-13-epi-8, 13-epoxy-2-oxa-3-oxolabd-14-ene-1R-carboxylic acid (5)。