A New Pyranoxanthone from the Stem Bark of Calophyllum inophyllum

Siau      H. Mah; Gwendoline      C.L. Ee; Mawardi      Rahmani; Yun      H. Taufiq-Yap; Rusea      Go; Soek      S. Teh

doi:10.2174/157017811796064430

Abstract

The stem bark of Calophyllum inophyllum gave one new prenylated dipyranoxanthone inophinone (1), together with two other xanthones, inophyllin A (2) and caloxanthone B (3) and three common triterpenes, friedelin (4), stigmasterol (5) and betulinic acid (6). 1D and 2D NMR spectral data (1H, 13C, DEPT, COSY, HMBC & HMQC) were used to elucidate the structures of these compounds

Keywords: Inophinone, dipyranoxanthone, Calophyllum inophyllum, Guttiferae, xanthones, inophyllin, caloxanthone, triterpenes, friedelin, stigmasterol

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Letters in Organic Chemistry

Title: A New Pyranoxanthone from the Stem Bark of Calophyllum inophyllum

Volume: 8 Issue: 6

Author(s): Siau H. Mah, Gwendoline C.L. Ee, Mawardi Rahmani, Yun H. Taufiq-Yap, Rusea Go and Soek S. Teh

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Keywords: Inophinone, dipyranoxanthone, Calophyllum inophyllum, Guttiferae, xanthones, inophyllin, caloxanthone, triterpenes, friedelin, stigmasterol

Abstract: The stem bark of Calophyllum inophyllum gave one new prenylated dipyranoxanthone inophinone (1), together with two other xanthones, inophyllin A (2) and caloxanthone B (3) and three common triterpenes, friedelin (4), stigmasterol (5) and betulinic acid (6). 1D and 2D NMR spectral data (1H, 13C, DEPT, COSY, HMBC & HMQC) were used to elucidate the structures of these compounds

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H. Mah Siau, C.L. Ee Gwendoline, Rahmani Mawardi, H. Taufiq-Yap Yun, Go Rusea and S. Teh Soek, A New Pyranoxanthone from the Stem Bark of Calophyllum inophyllum, Letters in Organic Chemistry 2011; 8 (6) . https://dx.doi.org/10.2174/157017811796064430