GSK2807 Trifluoroacetate is a potent and selective SMYD3 inhibitor that competes with S-adenosylmethionine (SAM), exhibiting a Ki of 14 nM and an IC50 of 130 nM. This compound is a valuable chemical probe for studying SMYD3s role in oncology and epigenetics, supporting both in vitro biochemical assays and in vivo cancer model research.