1. Computer, Computational, and Statistical Sciences Division, Los Alamos National Laboratory, Mail Stop B256, Los Alamos, New Mexico 87545, United States
2. OpenEye Scientific Software, 9 Bisbee Court, Unit D, Santa Fe, New Mexico 87507, United States
3. Department of Pharmaceutical Sciences, University of California, Irvine, 3134B Natural Sciences 1, Irvine, California 92697, United States
4. Department of Chemistry, University of California, Irvine, 3134B Natural Sciences 1, Irvine, California 92697, United States