参考文献
Gubina, T. I.; Rozhnov, A. A.; Voronin, S. P.; Kul'nevich, V. G.; Zhuravlev, S. V.; Kharchenko, V. G.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 8 p. 872 - 874
Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 8 p. 1046 - 1048
