5-Cyano-3-nitro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
6-Cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetic acid
Methyl 3-(chloromethyl)-2-fluoro-6-(trifluoromethoxy)pyridine-4-acetate
2-Cyano-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine-3-acetic acid