1. A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov Str. 28 119991 Moscow Russia
2. Dipartimento di Biotecnologie, Chimica e Farmacia Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
3. N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prosp. 47 119991 Moscow Russia