Chrysophanol, also known as chrysophanol, comes from the roots and rhizomes of Rhubarb in the polygonaceae family. It has antibacterial effect on a variety of bacteria (such as streptococcus A, pneumococcus, influenzae and cataracts), can relieve cough, promote bowel movement, promote nerve excitation and muscle paralysis, and also has obvious inhibitory effect on melanoma in mice