Ethyl 2-cyano-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetate
2-(Difluoromethyl)-6-fluoro-3-(trifluoromethoxy)pyridine-5-carboxylic acid
Ethyl 6-cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetate
Ethyl 2-cyano-4-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-acetate