Salvianolic acid Y is a phenolic acid with the same planar structure as Salvianolic acid B. Salvianolic acid Y rescues cell injury by H2O2.In Vitro: Salvianolic acid Y has protection activityon hydrogen peroxide (H2O2)-induced cell lesion. The protection rates of Salvianolic acid Y is 54.2% in rat pheochromocytoma line PC12.