The extraction and separation process of protopanaxatriol-type a-glycosides (ATG) in Sanqi was investigated. The methanol extract of Sanqi was separated over D-101 macroporous resin followed by MCI gel to yield the fraction enriched ATG. The obtained a-glycoside fraction contained 8 PPT-type glycosides (ATG-1-8). By comparing retention time with authentic compounds,5 of the 8 glycosides were characterized, among which ATG-2,5,7,8 were a-glycosides, and ATG-4 was P-glycoside. Furthermore,3 glycosides, ATG-1,...