3-(Bromomethyl)-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-carboxylic acid
3-(Bromomethyl)-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Cyano-3-(difluoromethyl)-6-(trifluoromethyl)pyridine
3-Cyano-6-(difluoromethyl)pyridine-2-acetic acid