1. University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K.
2. Discovery Chemistry, Janssen Research & Development, Janssen-Cilag S.A., Calle Jarama 75A, 45007 Toledo, Spain
3. Discovery Sciences Medicinal Chemistry, Janssen Research & Development, Janssen Pharmaceutica N.V., Turnhoutseweg 30, B-2340 Beerse, Belgium
4. Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States