参考文献:
Prostakov, N. S. Habib, Hanna Bu Kirillova, L. N. Sorokin, O. I. Varlamov, A. V. Chemistry of Heterocyclic Compounds (New York, NY, United States), 98 , vol. 9, # 7 p. 778 - 78 Khimiya Geterotsiklicheskikh Soedinenii, 98 , vol. 9, # 7 p. 967 - 97