Methylsulfonamide substituted 2,4-thiazolidinedione 22c is a potent (EC 50 =0.01 μM, IA=1.19) and selective (more than 110-fold over β 1 and β 2 agonist activity) β 3 agonist. This compound has also been proven to be active and selective in an in vivo mode. ... 2,4-Thiazolidinedione 22c is a potent and selective human β 3 agonist. ... The β 3 -adrenergic receptor (β 3 -AR) has been shown to mediate various pharmacological and physiological effects such as ...