3-(Chloromethyl)-6-(difluoromethyl)-4-methylpyridine-2-carboxylic acid
5-(Chloromethyl)-2-(difluoromethyl)-4-methylpyridine-3-carboxylic acid
5-(Chloromethyl)-2-(difluoromethyl)-3-methylpyridine-6-carboxylic acid
5-(Chloromethyl)-2-(difluoromethyl)-3-methylpyridine-4-carboxylic acid