BODIPY FL prazosin is a fluorescent α1-adrenergic antagonist with binding affinities of Ki: 14.5 nM for α1a-AR and Ki: 43.3 nM for α1b-AR, used to study subcellular localization differences in α1-adrenoceptor subtypes.

OPC-28326 is a specific an α2-adrenergic receptor antagonist and acts as a peripheral vasodilator. OPC-28326 inhibits α2A-, α2B- and α2C-adrenoceptors with Ki of 2040, 285, and 55?nM, respectively.

A potent, selective long-acting β2 adrenoceptor agonist with EC50 of 1.4 nM for hβ2; shows >250 fold selectivity over hβ1; exerts a bronchodilatory efficacy over 24 h in dogs and guinea pigs in the absence of systemic pharmacodynamic effects.COPDPhase 3 Clinical