参考文献
Hantzsch; Wolvekamp
Justus Liebigs Annalen der Chemie, 1904 , vol. 331, p. 279
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Atkinson
Journal of the Chemical Society, 1877 , vol. 32, p. 254
Journal of the Chemical Society, 1880 , vol. 37, p. 226
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Voelckel
Justus Liebigs Annalen der Chemie, 1842 , vol. 43, p. 76,83