4-Cyano-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetic acid
4-Cyano-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetic acid
Ethyl 5-cyano-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-acetate
Ethyl 4-cyano-5-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetate