Troxerutin is one of the derivatives of flavonoid rutin,which can be extracted from Sophora japonica.It is trihydroxyethyl rutin and has biological activities such as antithrombotic,anti red blood cell,anti fibrinolysis,inhibition of capillary dilation,antioxidant,anti radiation,anti-inflammatory,etc.It is used in cosmetics to have sunscreen,anti blue light,remove red blood,and improve black circles.