[1
]Department of Biotechnologies, Chemistry and Pharmacy, Università degli Studi di Siena,
via A. Moro 2, I-53100 Siena, Italy
[2
]Department of Life Sciences, Center for Neuroscience and Neurotechnology, Università
degli Studi di Modena e Reggio Emilia, I-41125 Modena, Italy
[3
]Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403,
United States