Flos Carthami, dried tubular flower of Carthamus tinctorius L., is an one or two years herb, is also an important crude drug in traditional Chinese medicine. Safflower yellow(SY) is one of chalcone compounds and it’s considered as the active compound in Carthamus. It was proved that SY had effects of promoting blood circulation, improving microcirculation, anticoagulated blood and preventing and curing thrombosis. hydroxysafflor yellow A (HSYA) has the higher concertration in SY and it is considered...