参考文献
Lolya, D. O.; Gavars, M. P.; Liepin'sh, E. E.; Freimanis, Ya. F.; Bokaldere, R. P.; et al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 9 p. 937 - 941
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , # 9 p. 1176 - 1180