Ethyl 5-cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetate
Ethyl 3-cyano-5-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-acetate
Ethyl 5-cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 5-fluoro-3-methyl-2-(trifluoromethoxy)pyridine-4-carboxylate