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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 939–941, June, 2011.
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Dyachenko, V.D. Unexpected synthesis of 2-(3,8-diaryl-6-oxo-2,7-diazaspiro[4.4]nona-2,8-dien-1-ylidene)malononitrile, a new heterocyclic system. Chem Heterocycl Comp 47, 776–777 (2011). https://doi.org/10.1007/s10593-011-0833-x
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DOI: https://doi.org/10.1007/s10593-011-0833-x