α 2C -adrenoceptor antagonist that displays ~ 50-fold selectivity over other α 2 -adrenoceptor subtypes (K i values are 28, 1470, 1700 and 3150 nM for human α 2C , α 2B , α 2D and α 2A subtypes respectively). Potently antagonizes adrenalin-stimulated 35 GTP γ S binding in vitro (K B = 16 nM) and produces antidepressant and antipsychotic-like effects in vivo .
