6-(Bromomethyl)-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-carboxylic acid
5-(Chloromethyl)-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-carbonyl chloride
2-(Bromomethyl)-5-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-carboxylic acid
3-(Chloromethyl)-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine-2-carbonyl chloride