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参考文献
Kuchkova,K.I.; Semenov,A.A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1971 , vol. 7, p. 1006 - 1008 Khimiya Geterotsiklicheskikh Soedinenii, 1971 , vol. 7, # 8 p. 1074 - 1075
Kuchkova,K.I.; Semenov,A.A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1971 , vol. 7, p. 1006 - 1008 Khimiya Geterotsiklicheskikh Soedinenii, 1971 , vol. 7, # 8 p. 1074 - 1075