参考文献:
Kuznetsov, V. V. Gaivoronskaya, L. A. Fomichev, A. A. Romero, R. M. Prostakov, N. S. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. , # 7 p. 779 - 78 Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 7 p. 99 - 95