参考文献:
Pina, M. del' K. Budylin, V. A. Rodriges, M. Terent'ev, P. B. Bundel', Yu. G. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 2 p. 142 - 146 Khimiya Geterotsiklicheskikh Soedinenii, 1989 , vol. 25, # 2 p. 180 - 184