1. Department of Medicinal Chemistry, Department of Inflammation, Department of HTS and Molecular Pharmacology, Department of Pharmacokinetics and Drug Metabolism, Department of Molecular Structures, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320-1799 Department of Medicinal Chemistry, Department of Small Molecule Process Development, Amgen Inc., One Kendall Square, Building 1000, Cambridge, Massachusetts 02139