参考文献
Zelenin, K.N.; Kuznetsova, O.B.; Alekseev, V.V.; Sergutina, V.P.; Terent'ev, P.V.; Ovcharenko, V.V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1991 , vol. 27, # 11 p. 1223 - 1227
Khimiya Geterotsiklicheskikh Soedinenii, 1991 , # 11 p. 1515 - 1520