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参考文献
Styngach,E.P. et al. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1973 , vol. 9, p. 1378 - 1382 Khimiya Geterotsiklicheskikh Soedinenii, 1973 , vol. 9, # 11 p. 1523 - 1527
Styngach,E.P. et al. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1973 , vol. 9, p. 1378 - 1382 Khimiya Geterotsiklicheskikh Soedinenii, 1973 , vol. 9, # 11 p. 1523 - 1527