Chrysophanol, scientific name Chrysophanol, Polygonaceae, can be used as me-dicine. The molecular formula is C15H10O4; the molecular weight is 254.23. It has antibacterial effect on a variety of bacteria, can stop cough, promote bowel movement, promote nerve excitement and muscle paralysis Almost insoluble in water, slightly soluble in cold alcohol, easily soluble in boiling ethanol, soluble in benzene, chloroform, ether, glacial acetic acid, acetone, etc., very slightly soluble in petroleum ether