参考文献
Kuznetsov, V. V.; Pal'ma, A.; Aliev, A. E.; Fernandes, M.; Prostakov, N. S.; Varlamov, A. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1993 , vol. 29, # 6 p. 671 - 675
Khimiya Geterotsiklicheskikh Soedinenii, 1993 , # 6 p. 784 - 788
