Screening of angiotensin converting enzyme inhibitors from Salvia miltiorrhizae Protective effect of seven kinds of phenolic acids of total salvianolic acids components on human umbilical vein endothelial cells with hypoxic injury Studies on hydroxyapatite applicatied in coprecipitate of total salvianolic acids phospholipid complex Protective effect of total salvianolic acids against cerebral ischemia-reperfusion injuries in mice and rats