参考文献

Gromova, G. P.; Belen'kii, L. I.; Krayushkin, M. M. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1993 , vol. 29, # 8 p. 889 - 891 Khimiya Geterotsiklicheskikh Soedinenii, 1993 , # 8 p. 1046 - 1048