参考文献:
Usova, E. B. Krapivin, G. D. Kul nevich, V. G. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1990 , vol. 6, # 4 p. 477 - 48 Khimiya Geterotsiklicheskikh Soedinenii, 1990 , # 4 p. 7 - 6
参考文献:
Krapivin, G. D. Usova, E. B. Kul nevich, V. G. Chemistry of Heterocyclic Compounds (New York, NY, United States), 198 , vol. 1, # p. 0 Khimiya Geterotsiklicheskikh Soedinenii, 198 , vol. 1, # p. 7