参考文献
Prostakov, N. S.; Varlamov, A. V.; Klochkov, A. M.; Fomichev, A. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 12 p. 1320 - 1322
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 12 p. 1669 - 1671