参考文献
Hopkins; Chisholm; Harris
Canadian Journal of Research, Section B: Chemical Sciences, 1949 , vol. 27, p. 38,40
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Vesely; Chudozilov
Collection of Czechoslovak Chemical Communications, 1930 , vol. 2, p. 98,101,102
Chem. Zentralbl., 1930 , vol. 101, # I p. 2540
