A new acylated flavone glycoside from Colebrookea oppositifolia

Abstract

A new acylated flavone glycoside, echioidinin 2′-O-β-d-(2″-O-acetyl)glucopyranoside (1) along with the three known flavonoids, 5,6,7,8,5′-pentamethoxy-3′,4′-methylenedioxyflavone (2), 5,2′,6′-trihydroxy-7-methoxyflavone (3), and kaempferol 7,4′-dimethyl ether 3-O-β-d-glucopyranoside (4), were isolated from the roots of Colebrookea oppositifolia. The structure of compound 1 was elucidated by extensive spectral and chemical studies.

Keywords:

• Colebrookea oppositifolia
• Labiatae
• roots
• acylated flavone glycoside
• echioidinin 2′-O-β-d-(2″-O-acetyl)glucopyranoside

Acknowledgements

The authors thank Dr Arul Marie and Mr Dubost Lionel, MNHN, Paris, France for mass measurements, and Dr M. Marthanda Murthy, Deputy Director, IICT, Hyderabad, India for NMR spectral data.