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