Methyl 4-cyano-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 4-cyano-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine-2-acetate
Methyl 4-cyano-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetate
2-Cyano-5-(fluoromethyl)-6-nitro-3-(trifluoromethoxy)pyridine