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参考文献
Semeikin, A.S.; Koifman, O.I.; Berezin, B.D. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1986 , vol. 22, # 4 p. 397 - 401 Khimiya Geterotsiklicheskikh Soedinenii, 1986 , vol. 22, # 4 p. 486 - 490
Semeikin, A.S.; Koifman, O.I.; Berezin, B.D. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1986 , vol. 22, # 4 p. 397 - 401 Khimiya Geterotsiklicheskikh Soedinenii, 1986 , vol. 22, # 4 p. 486 - 490