参考文献
Wallach; Kiepenheuer
Chemische Berichte, 1881 , vol. 14, p. 2618
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Kekule; Hidegh
Chemische Berichte, 1870 , vol. 3, p. 234
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Wallach; Belli
Chemische Berichte, 1880 , vol. 13, p. 525
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Heumann; Paganini
Chemische Berichte, 1890 , vol. 23, p. 3553