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Planta Med 1999; 65(4): 383-385
DOI: 10.1055/s-2006-960796
Letters

© Georg Thieme Verlag Stuttgart · New York

Shamimin: A New Flavonol C-Glycoside from Leaves of Bombax ceiba*

Shaheen Faizi, Muhammad Ali
  • H. E. J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
* Dedicated to the fond memory of Prof. Salimuzzaman Siddiqui F.R.S. (1897-1994).
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Publication History

1999

1999

Publication Date:
04 January 2007 (online)

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Abstract

Shamimin a new flavonol C-glycoside has been isolated as a pale yellow powder from the ethanolic extract of fresh, undried leaves of Bombax ceiba. Its structure has been elucidated as 2-(2,4,5-trihydroxyphenyl)-3,5,7-trihydroxy-6-C-glucopyranosyloxy-4H-1-benzopyran-4-one through extensive spectroscopic methods (IR, mass, 1H- and 13C-NMR), and 2D-NMR experiments. Shamimin showed antimicrobial activity against a few bacteria and fungi.