(untitled) - Gusarova,N.K.; Ivanova,N.I.; Bogdanova,M.V.; Sinegovskaya,L.M.; Sukhov,B.G.; Kopylova,L.I.; Trofimov,B.A. (Chem. Heterocycl. Compd. (Engl. Transl.), 2004)