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Original Articles

A new naphthoquinone from Ceiba pentandra

, , , &
Pages 227-230 | Received 23 Oct 2002, Accepted 04 Feb 2003, Published online: 17 Oct 2011
 

Abstract

A new naphthoquinone, 2,7-dihydroxy-8-formyl-5-isopropyl-3-methyl-1,4-naphthoquinone (1) together with a known naphthoquinone, 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (2), has been isolated from the heartwood of Ceiba pentandra. The structures of 1 and 2 have been elucidated by extensive 1D and 2D NMR experiments.

Acknowledgements

The authors thank Dr J. P. Brouard, Laboratoire de Chimie des Substances Naturelles, MNHN, Paris, France, for providing mass spectral data.

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