Proanthocyanidin A4, isolated from the root of E. sinica, is a polyphenol found in a variety of plants. Proanthocyanidin A4 possesses anti-inflammatory effects[1].
[1]. Lu WC, et al. Transformation of proanthocyanidin A2 to its isomers under different physiological pH conditions and common cell culture medium. J Agric Food Chem. 2011 Jun 8;59(11):6214-20.
















