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Kliger, G. A.; Lesik, O. A.; Marchevskaya, E. V.; Mikaya, A. I.; Zaikin, V. G.; et al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 2 p. 161 - 164
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , vol. 23, # 2 p. 195 - 198
