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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, p. 423, March, 1989.
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Parfenov, É.A., Savel'ev, V.L. & Smirnov, L.D. Controlling effect of substituents on the reduction of 4-substituted 3-nitrocoumarins by sodium hydrosulfite. Chem Heterocycl Compd 25, 356 (1989). https://doi.org/10.1007/BF00472402
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DOI: https://doi.org/10.1007/BF00472402