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参考文献
Voronkov,M.G.; Zelchan,G.I. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1965 , vol. 1, # 2 p. 137 - 140 Khimiya Geterotsiklicheskikh Soedinenii, 1965 , vol. 1, # 2 p. 210 - 214
Voronkov,M.G.; Zelchan,G.I. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1965 , vol. 1, # 2 p. 137 - 140 Khimiya Geterotsiklicheskikh Soedinenii, 1965 , vol. 1, # 2 p. 210 - 214