(untitled) - Sobenina,L.N.; D’yachkova,S.G.; Stepanova,Z.V.; Toryashinova,D.-S.D.; Albanov,A.I.; Ushakov,I.A.; Demenev,A.P.; Mikhaleva,A.I.; Trofimov,B.A. (Russ. J. Org. Chem., 1999)