1. Department of Medicinal Chemistry and Molecular Pharmacology; Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
2. Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
3. Department of Chemistry, MS-723, IIT Delhi, Hauz Khas, New Delhi 110016, India
4. Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142, United States