Structural determination of silymins A and B, new pentacyclic triterpenes from Silybum marianum, by 1D and 2D NMR spectroscopy

摘要

Silymins A (1) and B (2), the new pentacyclic triterpenes, have been isolated from ethyl acetate fraction of Silybum marianum and their structures assigned from H-1 and C-13 NMR spectra, DEPT and by 2D COSY, NOE and HMBC experiments. Copyright (C) 2006 John Wiley & Sons, Ltd.