Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
Five New Labdane-Type Diterpenes from Excoecaria agallocha. IV
Tenji KONISHIYasuhiro FUJIWARATakao KONOSHIMAShiu KIYOSAWA
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1998 Volume 46 Issue 9 Pages 1393-1398

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Abstract

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).

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© The Pharmaceutical Society of Japan
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