1. Laboratorium für Organische Chemie, Eidgenössische Technische Hochschule Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
2. Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham and University of Nottingham, Midlands, Nottingham NG7 2UH, U.K.
3. Faculty of Medicine & Health Sciences, University of Nottingham, Nottingham NG7 2UH, U.K.
4. Department of Chemical Physiology & Biochemistry, Oregon Health & Science University, Portland, Oregon 97239-3098, United States
5. Institute of Biomolecular Chemistry, National Research Council (ICB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
6. School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, U.K.
7. Department of Chemical Biology, Max Planck Institute for Medical Research, Jahnstr. 29, 69120 Heidelberg, Germany
8. Roche Pharma Research & Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., 4070 Basel, Switzerland
9. Vollum Institute, Oregon Health & Science University, Portland, Oregon 97239-3098, United States