1. Department
of Chemical Sciences, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, I-80126, Naples, Italy
2. Department
of Microbiology and Immunology, University of Nevada School of Medicine, Reno, Nevada 89557, United States
3. Department
of Microbiology and Immunology, University of South Alabama, Mobile, Alabama 36688, United States
4. Université de Poitiers, Institut de Chimie IC2MP, CNRS-UMR 7285, Équipe Synthèse Organique, 4 rue Michel Brunet, 86073 Poitiers Cedex-9, France