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[1]Gashev,S.B.;Borunov,M.M.;Smirnov,L.D.[BulletinoftheAcademyofSciencesoftheUSSRDivisionofChemicalScience,1981,vol.30,#9,p.1726-1728][IzvestiyaAkademiiNaukSSSR,SeriyaKhimicheskaya,1981,vol.30,#9,p.2102-2105]
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[1]Gashev,S.B.;Lezina,V.P.;Smirnov,L.D.[ChemistryofHeterocyclicCompounds,1983,vol.19,#9,p.1003-1007][KhimiyaGeterotsiklicheskikhSoedinenii,1983,#9,p.1252-1256]