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Unusually sulfated and oxygenated steroids from Withania somnifera
Laxminarain Misra1, Payare Lal, Rajender S Sangwan
1Central Institute of Medicinal and Aromatic Plants, P.O.-CIMAP, Lucknow, UP 226 015, India. laxmisra@hotmail.com
Abstract:
Four (1, 8-10) and six known (2-7) withanolides were isolated from the leaves of Withania somnifera. Among the new compounds, 10 possessed the rare 3-O-sulfate group with the saturation in A ring and 9 contained unusual 1,4-dien-3-one group. Compound 8 did not have usual 2,3 unsaturation in A ring while 1 had the rare C-16 double bond. The structures of all the compounds were elucidated by spectroscopic methods and chemical transformation.
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