OBJECTIVETo study chemical constituents of glucoside fraction from Liuwei Dihuang Gantang and clarify its substance foundation of active constituents.

METHODGlucoside fraction was prepared by macroporous resin chromatography. Constituents were separated by silica gel and reverse phase silica gel column chromatography, and their structures were identified by MS and NMR.

RESULTEleven compounds were separated and identified as 7-dehydrologanin (1), 7alpha-O-methylmorroniside (2), 7beta-O-methylmorroniside (3), 7alpha-O-ethylmorroniside (4), 7beta-O-ethylmorroniside (5), morroniside (6), sweroside (7), loganin (8), paeoniflorin (9), paeonolide (10) and loganic acid (11).

CONCLUSIONAll of those compounds were separated from Liuwei Dihuang Gantang for the first time.