5-Cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Cyano-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Cyano-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-carboxylic acid
2-(Bromomethyl)-6-fluoro-4-methyl-3-(trifluoromethoxy)pyridine