... 1). A Facile Separation Method for a Mixture of the Isomeric 2-Amino-3,5, and 6-methylpyrazines Nobuhiro Sato Department of Chemistry, Yokohama City ... Heterocyclic Chem., 14, 99 (1972 ... (5) JH Mowat, JH Boothe, BL Hutchings, EL Stokstad, CW Waller, RB Angier, J. Semb, DB ...