1. Pfizer Worldwide Research & Development, Cambridge, Massachusetts 02139, United States
2. Pfizer Worldwide Research & Development, Groton, Connecticut 06340, United States
3. Chemistry
and Biochemistry, University of California, Santa Cruz, California 95064, United States
4. Department
of Pharmaceutical Chemistry, University of California, San Francisco, California 94158, United States
5. Circle Pharma, South San Francisco, California 94080, United States