1. Institute of Bioorganic Chemistry and Petrochemistry, Murmanskaya Street 1, 02094 Kiev, Ukraine, Fax: +380‐44‐573‐2552
2. Institute of Organic Chemistry, Murmanskaya Street 5, 02094 Kiev, Ukraine
3. Institute of Inorganic and Physical Chemistry, University of Bremen, NW2 C2350, Leobener Strasse, 28334 Bremen, Germany, Fax: +49‐421‐218‐4267