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.