3-Cyano-2-(difluoromethyl)-4-methylpyridine-5-carboxylic acid
2-Cyano-3-(difluoromethyl)-5-methylpyridine-6-carboxylic acid
Ethyl 6-cyano-3-(difluoromethyl)-4-methylpyridine-2-carboxylate
Methyl 4-cyano-5-(difluoromethyl)-3-methylpyridine-2-carboxylate