Figure 2From: Chemical characterization and antioxidative activity of four 3-hydroxyl-3-methylglutaroyl (HMG)-substituted flavonoid glycosides from Graptopetalum paraguayense E. WaltherHPLC chromatograms (270 nm) of the (a) crude MeOH extract of G. paraguayense, (b) n-hexane extract, (c) EtOAc extract, (d) water extract, and (e) isolated flavonoid glycosides 1–4 (each 250 ppm). (Note: The impurity appearing at Rf 18 min on (e) is due to the contamination of compound 6.Back to article page