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Free keywords:
Heterophragma quadriloculare
Bignoniaceae
Naphthoquinones
Dehydro-alpha-lapachone
Heterophragma-quadriloculare
Chemistry in Current Contents(R)/Physical, Chemical & Earth Sciences
Abstract:
In boiling pyridine, lapachol (1) is transformed into novel asymmetric naphthoquinone derivative, quadrilone (2), and into dehydro-alpha-lapachone (3), and adenophyllone (4). Lapachol used in the present study was isolated from the heartwood of Heteroph