Potent melanin-concentrating hormone receptor 1 (MCH1) antagonist (Ki = 2.2 nM, KD = 530 pM) that displays > 80-fold and > 500-fold selectivity over α1A and D2 receptors respectively. Increases neurogenesis in the dentate gyrus and decreases food-reinforced operant responding in vivo. Exhibits anxiolytic activity and is orally active. Purity 98%. MW (observed): 515.03