参考文献

Vainilavichyus, P. I.; Syadyaryavichyute, V. Yu. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 11 p. 1216 - 1218 Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 11 p. 1520 - 1522