Five New Labdane-Type Diterpenes from Excoecaria agallocha. IV

Tenji KONISHI; Yasuhiro FUJIWARA; Takao KONOSHIMA; Shiu KIYOSAWA

doi:10.1248/cpb.46.1393

Tenji KONISHI, Yasuhiro FUJIWARA, Takao KONOSHIMA, Shiu KIYOSAWA

Author information

Keywords: Excoecaria agallocha, Euphorbiaceae, secolabdane-type diterpene, labdane-type diterpene, structure elucidation

JOURNAL FREE ACCESS

1998 Volume 46 Issue 9 Pages 1393-1398

DOI https://doi.org/10.1248/cpb.46.1393

Details

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).

Corresponding author

Register with J-STAGE for free!