参考文献
Nasakin, O. E.; Lyshchikov, A. N.; Lukin, P. M.; Tafeenko, V. A.; Bulai, A. Kh.; Medvedev, S. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1992 , vol. 28, # 10 p. 1124 - 1129
Khimiya Geterotsiklicheskikh Soedinenii, 1992 , # 10 p. 1325 - 1330
