Potent, dual orexin receptor antagonist (Ki values are 0.2 and 3 nM for OX2 and OX1 receptors respectively). Inhibits ADL-orexin B-mediated locomotion following i.p. administration in vivo and blocks orexin-A (Cat.No.1455) mediated increases in feeding behaviour. Brain penetrant. Purity 98%. MW (observed): 470.59