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Note | Regular issue | Vol 45, No. 10, 1997, pp.2045-2052
Published online, 1st January, 1970
DOI: 10.3987/COM-97-7901
Three New Coumarins from Calophyllum teysmannii var. inophylloide (Guttiferae)

Shu-Geng Cao, Keng-Yeow Sim, and Swee-Hock Goh*

*Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore

Abstract

A chemotaxonomic survey of Malaysian Calophyllum plants for potential bioactive compounds provided three new coumarins [12-methoxyinophyllum P (1), hydrohydroxyisocalanone (2) and 4-phenyl-5-methoxy-7-hydroxy-8-benzoylcoumarin (3)] from the bark of C. teysmannii var. inophylloide, together with known compounds calanone (4) and betulinic acid. Their structures were determined by spectroscopic analysis including 2D NMR.