.beta.-Collidine .beta.-Ethyl-.gamma.-methylpyridine 3-Ethyl-.gamma.-picoline 3-Ethyl-4-methylpyridine 3-Ethyl-4-picoline 4-Methyl-3-ethylpyridine 4-Picoline, 3-ethyl- 529-21-5 NSC62016 Pyridine, 3-ethyl-4-methyl-