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Planta Med 2013; 79(12): 1063-1067
DOI: 10.1055/s-0032-1328719
DOI: 10.1055/s-0032-1328719
Natural Product Chemistry
Letters
New 23-Spirocholestane Derivatives from Ypsilandra thibetica
Further Information
Publication History
received 23 January 2013
revised 10 May 2013
accepted 20 May 2013
Publication Date:
01 July 2013 (online)
Abstract
Three new unusual 23-spirocholestane derivatives, ypsilanogenin (1), ypsilanogenin 3-O-β-D-glucopyranoside (2), and 4′-acetylypsilanogenin 3-O-β-D-glucopyranoside (3), were isolated from the whole plants of Ypsilandra thibetica. The structures of compounds 1–3 were deduced by spectroscopic and chemical methods, and the structure of 1 was further confirmed by a single-crystal diffraction analysis. All isolates were evaluated for their inhibitory activities against HIV-1.
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