5-Bromo-3-(chloromethyl)-2-(difluoromethyl)pyridine-4-carboxylic acid
5-Bromo-3-(chloromethyl)-4-(difluoromethyl)pyridine-2-carboxylic acid
3-Bromo-5-(chloromethyl)-2-(difluoromethyl)pyridine-6-carboxylic acid
5-Bromo-4-(chloromethyl)-2-(difluoromethyl)pyridine-3-carboxylic acid