4’,5,7-Trimethoxyflavone is a flavonoid that has been found in K. parviflora and has diverse biological activities.^1,2,3 It inhibits acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) by 47.1 and 46.2%, respectively, in a cell-free assay when used at a concentration of 0.1 mg/ml.¹ 4’,5,7-Trimethoxyflavone (1 and 10 µM) scavenges radicals in a Trolox equivalent antioxidant capacity (TEAC) assay.² It inhibits RANKL-induced osteoclastic differentiation of RAW 264.7 cells when used at a concentration of 10 µM. 4’,5,7-Trimethoxyflavone stimulates chloride secretion in Calu-3 human airway epithelial cells, which endogenously express cystic fibrosis transmembrane conductance regulator (CFTR) as their major apical chloride channel.³