参考文献

Shapiro, Yu. M.; Smolyakov, V. P.; Kul'nevich, V. G. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1990 , vol. 26, # 6 p. 617 - 620 Khimiya Geterotsiklicheskikh Soedinenii, 1990 , # 6 p. 741 - 744