Danthron (Chrysazin, Antrapurol) functions in regulating glucose and lipid metabolism by activating AMPK. Danthron is a natural product extracted from the traditional Chinese medicine rhubarb. Danthron used to be a laxativa and now is currently used as an antioxidant in synthetic lubricants, in the synthesis of experimental antitumor agents, as a fungicide and as an intermediate for making dyes.