参考文献

Fisyuk, A. S.; Unkovskii, B. V. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1991 , vol. 27, # 3 p. 339 - 341 Khimiya Geterotsiklicheskikh Soedinenii, 1991 , # 3 p. 416 - 419