1. a “Petru Poni” Institute of Macromolecular Chemistry of the Romanian Academy , Iasi , Romania
2. b Institute of Chemistry, Academy of Sciences of Moldova , Chisinau , Republic of Moldova
3. c Universita degli Studi di Trento, Laboratorio di Chimica Bioorganica , Povo , Italy
4. d “Costin D. Nenitescu” Centre of Organic Chemistry of the Romanian Academy , Bucharest , Romania
5. e Metropolitan Center of Research T.A.B.O.R , Iasi , Romania