参考文献:
Abdrakhmanov, I. B. Mustafin, A. G. Tolstikov, G. A. Dzhemilev, U. M. Chemistry of Heterocyclic Compounds (New York, NY, United States), 987 , vol. 23, # 4 p. 42 - 422 Khimiya Geterotsiklicheskikh Soedinenii, 987 , # 4 p. 55 - 57
参考文献:
Knoll and Co. Patent: DE363582 Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 4, p. 52 Full Text Show Details Knoevenagel Baehr Chemische Berichte, 922 , vol. 55, p. 926