Selective α2A-adrenoceptor antagonist (Ki = 1.7 nM and 144.5 nM at α2A and α2B-adrenergic receptors respectively). Increases hippocampal noradrenalin release following systemic administration. Also available as part of the α2-Adrenoceptor Tocriset?. Purity 98%. MW (observed): 331.37