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Cloetta Naunyn-Schmiedebergs Archiv fuer Experimentelle Pathologie und Pharmakologie, 1926 , vol. 112, p. 277 Chem. Zentralbl., 1926 , vol. 97, # II p. 772,773 Full Text Show Details Windaus; Schwarte Chemische Berichte, 1925 , vol. 58, p. 1515,1519 Full Text Show Details Smith Journal of the Chemical Society, 1931 , p. 23,25