1. Medicinal Chemistry & Drug Discovery Department of Pharmacology University of Oxford Mansfield Road Oxford OX1 3QT UK
2. Institute of Metabolism & Systems Research University of Birmingham 2nd Floor IBR Tower Edgbaston Birmingham B15 2TT UK
3. Centre for Endocrinology Metabolism and Diabetes University of Birmingham Birmingham Health Partners Birmingham B15 2TT UK
4. Molecular Pharmacology Branch Developmental Therapeutics Program Division of Cancer Treatment and Diagnosis National Cancer Institute Frederick MD 21702 USA
5. Chemical Crystallography Department of Chemistry University of Oxford Mansfield Road Oxford OX1 3TA UK