参考文献
Trzhtsinskaya, B. V.; Rudakova, E. V.; Afonin, A. V.; Keiko, V. V.; Voronov, V. K.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 9 p. 978 - 981
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 9 p. 1224 - 1226