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