Newboulasides A and B, two new caffeic acid glycosides from with α-amylase inhibitory activity.

Chemical investigation of the ethanol extract of the leaves of (P. Beauv) led to the isolation of two new caffeic acid glycosides, Newboulasides A and B . The structures of these compounds were determined on the basis of extensive spectroscopic methods, including 1D-, 2D-NMR and MS data.