参考文献

Bulychev, Yu. N.; Preobrazhenskaya, M. N. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1988 , vol. 24, # 11 p. 1265 - 1270 Khimiya Geterotsiklicheskikh Soedinenii, 1988 , vol. 24, # 11 p. 1526 - 1531