1. Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
2. Chemical Development, GlaxoSmithKline, Collegeville, Pennsylvania 19426, United States
3. Molecular Design, Data & Computational Sciences, GlaxoSmithKline, Collegeville, Pennsylvania 19426, United States
4. Department of Chemistry, University of Victoria, Victoria, British Columbia V8P 5C2, Canada