Active constituents with α-glucosidase inhibitory activities from Sabia parviflora.

To identify the active constituents with α-glucosidase inhibitory activities in Sabia parviflora, three new compounds, namely, sabiaparviflora A-C (1, 2 and 8), and seven known compounds were isolated from the plant by repeated column chromatography. The structures of the new compounds were identified by extensive application of spectroscopic methods, including H NMR, C NMR, IR and HR-ESI-MS. All compounds, except for compounds 3-5, 9 and 10 were isolated for the first time from S.