Comparative evaluation of rosmarinic acid, methyl rosmarinate and pedalitin isolated from Rabdosia serra (MAXIM.) HARA as inhibitors of tyrosinase and α-glucosidase

► Pedalitin exhibits great inhibitory effects against tyrosinase and α-glucosidase. ► Rosmarinic acid shows a weaker inhibition activity than its methyl ester. ► Three phenolics tested in the study show different inhibition types against tested enzymes.