3-(Bromomethyl)-5-(difluoromethyl)-2-iodopyridine-6-carboxylic acid
5-(Bromomethyl)-4-(difluoromethyl)-2-iodopyridine-3-carboxylic acid
4-(Chloromethyl)-3-(difluoromethyl)-5-iodo-2-(trifluoromethyl)pyridine
5-(Bromomethyl)-4-(difluoromethyl)-3-iodopyridine-2-carboxylic acid