1. Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria, Laboratory of Molecular Modeling, Division of Medicinal Chemistry and Natural Products, School of Pharmacy, CB 7360, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, Targacept, East First Street, Suite 300, Winston-Salem, North Carolina, Eli Lilly and Company, 20 T. W. Alexander Drive, P.O. Box 13951, Research Triangle Park, North Carolina 27709, and Department of...