1,2,3,4,6-O-pentagalloylglucose
1,2,3,4,6-Penta-O-galloyl-β-D-glucopyranose, a natural product isolated and purified from the peel of Punica granatum L., suppresses interleukin (IL)-4 induced signal pathway in B cell, and inhibits IgE production partially caused by increasing a population of Treg cells in conjunction with Treg-inducing factors.