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1H and 13C NMR assignments for four triterpenoid saponins from Albizziae cortex

Four triterpenoid saponins were isolated from Albizziae cortex, and a complete assignment of their 1H and 13C NMR spectra was carried out using 1D and 2D NMR (1H1H COSY, HSQC, HMBC, and HSQC–TOCSY) methods. Their 1H NMR assignments were reported for the first time and some of their 13C NMR spectral data reported in literature were corrected. Copyright © 2008 John Wiley & Sons, Ltd.