Barleriaquinone-I from the heartwood of Tectona grandis Linn.

Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India E-mail : pahupsingh@yahoo.co.uk Department of Chemistry, R. B. S. College, Agra-282 002, Uttar Pradesh, India Manuscript received 3 June 2008, revised 3 July 2008, accepted 8 July 2008 Barleriaquinone-I, a cytotoxic anthraquinone, has been isolated from the heartwood of Tectona grandis Linn., along with previously reported lapachol, tecomaquinone-I, deoxylapachol, tectoquinone, stigmasterol and dehydro-α-lapachone. This is the first report on the isolation of barleriaquinone-I from this plant as well as from the family Verbenaceae. A detailed spectral data of the compound together with its HMBC correlations are reported