ARC 239 is an α2B/C-adrenergic receptor antagonist with pKi of 7.06 and 6.95 for rat kidney α2B and human α2C, respectively. ARC 239 also inhibits 5-HT1A receptor with a Ki of 63.1 nM[1][2].
[1]. K T Gavin, et al. Alpha 2C-adrenoceptors mediate contractile responses to noradrenaline in the human saphenous vein. Naunyn Schmiedebergs Arch Pharmacol. 1997 Mar;355(3):406-11.
[2]. J J Meana, et al. The subtype-selective alpha 2-adrenoceptor antagonists BRL 44408 and ARC 239 also recognize 5-HT1A receptors in the rat brain. Eur J Pharmacol. 1996 Oct 3;312(3):385-8.
















