1. Department of Chemistry, Scripps Research Institute, La Jolla, CA 92037, USA.
2. Discovery Chemistry, Bristol-Myers Squibb, Princeton, NJ 08543, USA.
3. Chemical Development, Bristol-Myers Squibb, New Brunswick, NJ 08903, USA.
4. Kemxtree LLC, 1370 Hamilton Street, Somerset, NJ 08873, USA.