1. Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, United States
2. Department of Biotechnology, Chemistry and Pharmacy, Università di Siena, via A. Moro 2, I-53100 Siena, Siena, Italy
3. Firefly Project, Moscow 117593, Russia
4. Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia