参考文献

Letunov, V. I.; Soldatova, N. P. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 8 p. 861 - 864 Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 8 p. 1077 - 1081