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