参考文献:
Gol'dfarb, Ya. L. Ostapenko, E'. G. Ivanov, V.B. Efremkin, A. F. Litvinov, V. P. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , vol. 18, # 11 p. 1148 - 1153 Khimiya Geterotsiklicheskikh Soedinenii, 1982 , vol. 18, # 11 p. 1482 - 1488