Ethyl 2-cyano-5-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-acetate
Ethyl 6-cyano-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-acetate
Methyl 4-cyano-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetate
Methyl 4-cyano-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetate