BMS-193885 is a potent, selective, competitive and brain-permeable Neuropeptide Y1 receptor antagonist, the Ki is 3.3 nM and The IC50 value for hY1 is 5.9 nM. The selectivity is 100 times higher than that of α1 receptor and 160 times higher than that of hY2, hY4 and hY5 receptors.