1. Departments of Medicinal Chemistry, Pharmacology and Lead Discovery, Neuroscience, Chemical Development and Preclinical Development, Neurocrine Biosciences, 12790 El Camino Real, San Diego, California 92130, and Almirall Research Center, Almirall, Ctra. Laureà Miró, 408-410, E-08980 St. Feliu de Llobregat, Barcelona, Spain