Emodin   Anthraquinones represent a large family of compounds having diverse biological properties. Emodin (1,3,8-trihydroxy-6-methylanthraquinone) is a naturally occurring anthraquinone present in the roots and barks of numerous plants, molds, and lichens, and an active ingredient of various Chinese herbs

Purposes : the goods can be used as a laxative, emodin despite theremoval of activity, but because the body susceptible to oxidation and,in fact, the removal of very minor role, if combined with the sugar into glycosides may play a role in the removal. Emodin-1-O-beta-D-glucosaminidase and emodin-8-O-beta-D-glucoside is the combination of glucose and emodin glucoside, is combining the two different positions,which exists in rhubarb.