参考文献
Vernigor, E. M.; Koz'menko, M. V.; Lebedev, S. A.; Luk'yanets, E. A.; Savvina, L. P.; Shalaev, V. K.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 6 p. 677 - 680
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , vol. 23, # 6 p. 820 - 823