A potent, selective α2A-adrenoceptor antagonist with Ki of 1.7 nM, 80-fold selectivity over α2B-adrenergic receptors.

BRL 37344 is a potent and selective β3 adrenoceptor agonist with Ki of 287 nM; has weaker binding affinity for β1 and β2 receptors with Ki of 1750 and 1120 nM, respectively.

Milveterol (GSK 159797) is a potent, selective long-acting β2 adrenoceptor agonist with pEC50 of 10.2 in cell-based assays.