[1] Univ Roma La Sapienza, CNR, Ist Chim Biomol, Dipartimento Chim & Tecnol Farmaco, I-00185 Rome, Italy
[2] Univ Roma La Sapienza, Dipartimento Chim, I-00185 Rome, Italy
[3] Univ Chieti Pescara G DAnnunzio, Dipartimento Sci Farmaco, I-00185 Rome, Italy
[4] Univ Arizona, Dept Pharmacol, Tucson, AZ 85719 USA
[5] Univ Arizona, Dept Chem, Tucson, AZ 85721 USA