参考文献

Shutalev, A. D.; Kuksa, V. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1993 , vol. 29, # 12 p. 1470 - 1471 Khimiya Geterotsiklicheskikh Soedinenii, 1993 , # 12 p. 1698 - 1699