参考文献
Baxter; Spring
Journal of the Chemical Society, 1943 , p. 613
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Ruzicka; Bosshard
Helvetica Chimica Acta, 1937 , vol. 20, p. 244,247
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Westphalen; Windaus
Chemische Berichte, 1915 , vol. 48, p. 1064
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Fujii; Matsukawa
Yakugaku Zasshi, 1936 , vol. 56, p. 642,646; dtsch. Ref. S. 150
Chem. Zentralbl., 1937 , vol. 108, # I p. 2616