Abstract
From the wood of Excoecaria agallocha LINN., three new labdane-type diterpenes, ent-11α-hydroxy-3-oxo-13-epi-manoyl oxide (4), ent-16-hydroxy- 3-oxo-13-epi-manoyl oxide (5) and ent-15-hydroxy-labda-8(17),13E-diene-3-one (6) were isolated together with three known compounds, ent-3-oxo-13-epi- manoyl oxide (ribenone,1), ent-3β-hydroxy-13-epi-manoyl oxide (ribenol, 2) and ent-13-epi-manoyl oxide (3), and their structures were determined.
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Konishi, T., Azuma, M., Itoga, R., Kiyosawa, S., Fujiwara, Y., & Shimada, Y. (1996). Three new labdane-type diterpenes from wood, Excoecaria agallocha. Chemical and Pharmaceutical Bulletin, 44(1), 229–231. https://doi.org/10.1248/cpb.44.229
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