Stapleton; White Journal of the American Pharmaceutical Association (1912-1977), 1954 , vol. 43, p. 193,199 Full Text Show Details Sugasawa; Sugimoto Yakugaku Zasshi, 1941 , vol. 61, p. 62,67; engl. Ref. S. 26, 29 Chem. Zentralbl., 1941 , vol. 112, # II p. 1277