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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 279–280, February, 1972.
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Kogan, N.A., Vlasova, M.I. Cyclization of 2-indoylhydrazones to dihydropyrrolo[3,4-b]indole derivatives and their isomeriz ation to pyridazino[4,5-b]indoles. Chem Heterocycl Compd 8, 252–253 (1972). https://doi.org/10.1007/BF00472370
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DOI: https://doi.org/10.1007/BF00472370