Spiny burs of Castanea mollissima Blume (Chinese chestnut) are usually discarded as industrial byproduct during post-harvesting processing which cause a great waste of resource. Therefore, the study on chemical composition and biological activity of Castanea mollissima spiny burs (CMPE) is significant for the potential utilities and systematic development of chestnut industry. Based on a early established procedure of extraction and isolation of tannins from chestnut burs, the objective of this study was to...