1. Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, 40129 Bologna, Italy
2. Center of Advanced Technologies, Adam Mickiewicz University, 61-712 Poznan, Poland
3. Facultad de Farmacia y Bioquímica, Departamento de Ciencias Químicas, Universidad de Buenos Aires, Junin 954, Buenos Aires CP 1113, Argentina
4. Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece