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SYNTHESIS AND STRUCTURE OF METHYL-SUBSTITUTED 1,2,4,5-TETRAHYDRO-3H-SPIRO[BENZ-2-AZEPINE-3,4'-PIPERIDINES] Article KUZNETSOV V.V., LANTSETOV S.V., ALIEV A.E., VARLAMOV A.V., PROSTAKOV N.S. Chemistry of Heterocyclic Compounds / KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII. Латвийский институт органического синтеза Латвийской академии наук. 1991. P. 1528-1532