参考文献

Sergovskaya, N. L.; Tsizin, Yu. S.; Chernyak, S. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 6 p. 654 - 655 Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 6 p. 803 - 804