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