Harpagide, angoroside C, isoangoroside C, and harpagoside were the four major compounds from the total ion current (TIC) chromatogram of S. ningpoensis extract (Figure 9). Since cinnamic acid glycosides were analyzed and validated to be the most bioactive chemical class apart from iridoid glycosides and iridoid-cinnamic acid glycosides, the most abundant cinnamic acid glycoside, angoroside C, was suggested as a chemical marker for S. ningpoensis.