W. Hayasida

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Phytochemical investigation of the leaves of Guarea convergens T. D. Penn. led to the isolation of new apotirucallane triterpenes 24-acetoxy-25-hydroxy-3,7-dioxoapotirucalla-14-en-21,23-olide and 7α,24,25-trihydroxy-3-oxoapotirucalla-14-en-21,23-olide, steroid ergosta-5,24(24′)-diene-3β,7α,21-triol, in addition to the known(More)
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