TUG-499 is a selective free fatty acid receptor 1 (FFAR1 or GPR40) ( Free Fatty Acid Receptor ) agonist with a pEC 50 of 7.39. TUG-499 exhibits >100-fold selectivity over the related receptors FFA2, FFA3, and the nuclear receptor PPARγ and other diverse receptors, ion channels, and transporters. TUG-499 can be used for the research of type 2 diabetes. TUG-499 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.