1. Chemistry Johns Hopkins University 3400 N. Charles St. 21218 Baltimore MD USA
2. Institute of Pharmaceutical Chemistry Johann Wolfgang Goethe University Max-von-Laue-Str. 9 60438 Frankfurt am Main Germany
3. Buchmann Institute for Molecular Life Sciences and Structural Genomics Consortium (SGC) Max-von-Laue-Str. 15 60438 Frankfurt am Main Germany