1. Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
2. Leidos Biomedical Research, Inc., Frederick National
Laboratory for Cancer Research, Computational Drug Development Group, P.O. Box B, Frederick, Maryland 21702, United States
3. Frederick National Laboratory for Cancer Research, Developmental Therapeutics Program, Computational Drug Development
Group, P.O. Box B, Frederick, Maryland 21702, United States