Dimethylmethoxybenzodihydropyranol has a dual trapping effect on oxygen radicals (ROS) and nitrogen radicals (RNS); Inhibiting lipid peroxidation reactions caused by peroxynitrite anions; Prevent damage to skin cells caused by peroxynitrite anions and nitric oxide; By inhibiting oxygen free radicals generated by ultraviolet A, it achieves the effect of anti pollution and skin purification.