Safflower (Carthamus tinctorius L.) belongs to the family Compositae and is widely distributed in the Xinjiang Uygur Autonomous Region, Zhejiang, Henan, and Sichuan province of China. The flowers of this plant are used as a remedy for dysmenorrheal, wound, coronary disease, angina pectoris, and hypertension in Chinese folk medicine. Various bioactives of Safflower have been confirmed by modern pharmacology, especially the cadiovascular bioactivities. Now, hydroxysafflor yellow A as a main constituents of sa...