... XIX.” The Alkaline Ferricyanide Oxidation of 1,3-Disubstituted Pyridinium Salts: Effects of Branched Alkyl Groups at the 3-Position2l Tozo Fum,* TAKASHI HIRAGA, and MASASHI ... References and Notes 1) Paper XVIII in this series, T. Fujii, T. Hiraga, and M. Ohba, Chem. ...