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Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay
Published on: September 14, 2014
Anti-HIV-1 protease triterpenoids from Stauntonia obovatifoliola Hayata subsp. intermedia
Ying Wei1, Chao-mei Ma, De-yuan Chen
1Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
Abstract:
Three triterpenoids, 16beta-hydroxy-2,3-seco-lup-20(29)-ene-2,3-dioic acid (1), 3beta,21beta,24-trihydroxy-30-noroleana-12,20(29)-dien-28-oic acid (2) and 16beta-hydroxylupane-1,20(29)-dien-3-one (3), along with eleven known triterpenes were isolated from stems of Stauntonia obovatifoliola Hayata subsp. intermedia (Y.C. Wu) T. Chen. Their structures were determined by analysis of HR-EI/FAB-MS and 1D and 2D NMR spectroscopic data and comparison with those in the literature. Ten of the compounds showed inhibitory activity against HIV-1 protease.
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