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■ Two New Xanthones in the Underground Part of Calophyllum inophyllum

Munekazu Iinuma,* Hideki Tosa, Toshiyuki Tanaka, and Shigetomo Yonemori

*Department of Pharmacognosy, Gifu Pharmaceutical University, 6-1 Mitahora-higashi 5-chome, Gifu 502-8585, Japan

Abstract

From the root bark of Calophyllum inophyllum L. (Guttiferae), a new xanthone named caloxanthone C (1) and 4-hydroxyxanthone (2), and from the heartwood of root, a new xanthone 1-hydroxy-2-methoxyxanthone (3) in addition to three known xanthones [1,2-dimethoxy- (4), 2-hydroxy-1-methoxy- (5)], and 6-deoxyjacareubin (6) were isolated. The structures were characterized by means of a spectroscopic analysis.