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UPLC-MS/MS chromatograms of eight flavonoids of the leaves in CS. (A) epicatechin (1.30 min); (B) quercetin (4.65 min); (C) vitexin (2.58 min); (D) isoquercetin (2.86 min); (E) hyperoside (2.65 min); (F) vitexin-2”-O-rhamnoside (2.39 min); (G) vitexin-2”-O-glucoside (2.06 min) and (H) rutin (2.40 min).
