1. Medicinal Chemistry, Department of Pharmacy and Pharmacology & Sterix Ltd., University of Bath, Bath BA2 7AY, United Kingdom, Endocrinology and Metabolic Medicine and Sterix Ltd., Faculty of Medicine, Imperial College, St. Mary's Hospital, London W2 1NY, United Kingdom, Istituto di Biostrutture e Bioimmagini-CNR, Naples, Italy, and Laboratorio di Chimica Bioinorganica, Università degli Studi di Firenze, Florence, Italy