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van Gysegem Chem. Zentralbl., 1907 , vol. 78, # I p. 530 Full Text Show Details Keil Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1942 , vol. 274, p. 180 Full Text Show Details Ellis; Reid Journal of the American Chemical Society, 1932 , vol. 54, p. 1685