Bioactive phenolic components and antioxidant activities of water-based extracts and flavonoid-rich fractions from L. leaves.

() has been widely used as folk medicine. This study aimed to identify and assess the significant phenolics' antioxidant activities in young (S1) and old (S2) leaves of Six flavonoids; isoquercitrin, kaempferol-3-neohesperidoside, myricetin-3-galactoside, apigenin-O-hexoside, isorhamnetin and isorhamnetin-3-neohesperidoside, were identified for the first time in leaves using LC-ESI-QTOF MS/MS analysis. The flavonoid-rich fraction obtained after purification of S1 (S1TF7) has the highest TFC (358.