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