参考文献
Doronina, S. O.; Gall', A. A.; Shishkin, G. V.; Mamatyuk, V. I.; Sal'nikov, G. E.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1991 , vol. 27, # 7 p. 779 - 782
Khimiya Geterotsiklicheskikh Soedinenii, 1991 , # 7 p. 971 - 975
