1. Department of Medicinal Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, 4070 Malott Hall, Lawrence, Kansas 66045, and KU Center for Chemical Methodology and Library Development (KU-CMLD), The University of Kansas, 2121 Simons Drive, 2070 Structural Biology Center, Lawrence, Kansas 66045
2. Department of Chemistry and Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, 590 Commonwealth Avenue, Boston Massachusetts 02215