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Several new 2-cyanohydrazonomethyl pyridines and pyrido[2,3-dlpyridazine derivatives were obtained via the reaction of arylhydrazononitriles with 2-amino-1,1,3+ricyanopropeneand diethyl 3-amino-2-cyanopent-2-ene-dicarboxylate.1 3 .
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Kandeel et al. (1986) studied this question.
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