1. Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
2. Minakem High Potent, 8 Rue Fond Jean Pâques, 1435 Mont-Saint-Guibert, Belgium
3. Minakem Recherche, 145 Chemin des Lilas, 59310 Beuvry-la-Forêt, France