3,5-Dicaffeoylquinic acid is an isolated compound from Artemisia argyi; its ester derivatives exert anti-leucyl-tRNA synthetase of Giardia lamblia (GlLeuRS) and potential anti-giardial effects. 3,5-di-O-caffeoylquinic acid as a neuraminidase inhibitory ligand in Flos Lonicerae, it has neuroprotective effects on SH-SY5Y cells and senescence-accelerated-prone mice 8 through the up-regulation of phosphoglycerate kinase-1. 3,5-di-O-caffeoylquinic acid also has antioxidant and anti-complementary activities.