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Notes

Venuloxanthone, a new pyranoxanthone from the stem bark of Calophyllum venulosum

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Pages 1104-1108 | Received 19 Oct 2014, Accepted 28 Apr 2015, Published online: 29 May 2015
 

Abstract

A new pyranoxanthone, venuloxanthone (1), was isolated from the stem bark of Calophyllum venulosum, together with three other xanthones, tovopyrifolin C (2), ananixanthone (3) and caloxanthone I (4), along with two common triterpenes, friedelin (5) and lupeol (6). The structures of these compounds were identified using several spectroscopic analyses which are NMR, GCMS and FTIR experiments.

Acknowledgment

The Sarawak Biodiversity Centre is acknowledged.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors express their gratitude for the financial support from UPM under the RUGS Research Fund.

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