From the woods of Excoecaria agallocha, a new isopimarane-type diterpene, 3alpha,11beta-dihydroxy-ent-isopimara-8(14),15-dien-2-one and a new natural atisane-type diterpene, 16beta-hydroxy-ent-atisan-3-one were isolated together with three known compounds, ribenone, ent-labda-8(17),13E-diene-3beta,15-diol, and ent-3beta-hydroxybeyer-15-ene-2,12-dione. Their structures were determined by spectral data and x-ray crystallography evidence.

中文翻译：

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来自Excoecaria agallocha的一种新的异匹烷烷型二萜和一种新的天然茴香脑型二萜。

从Excoecaria agallocha的森林中，得到了一种新的异匹马烷型二萜3alpha，11beta-dihydroxy-ent-isopimara-8（14），15-dien-2-one和一种新的天然atisane型二萜，16beta-hydroxy-ent -atisan-3-one与三种已知化合物，ribenone，ent-labda-8（17），13E-diene-3beta，15-diol和ent-3beta-hydroxybeyer-15-ene-2,12- dione。它们的结构由光谱数据和X射线晶体学证据确定。