1. Pharmaceutical Institute, Department of Pharmaceutical Chemistry; Christian-Albrechts-University of Kiel; Gutenbergstraße 76 Kiel D-24118 Germany
2. Digilab Software GmbH; Posener Str. 18 Altenholz D-24161 Germany
3. Republican Drug Dispensary of Health Care Ministry of Chuvash Republic; Pirogova Str. 6 Cheboksary 428015 Chuvash Republic Russia