Methyl 3-chloro-2-cyano-4-(trifluoromethoxy)pyridine-5-acetate
Methyl 4-bromo-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-acetate
Methyl 3-bromo-6-(fluoromethyl)-4-(trifluoromethoxy)pyridine-2-acetate
Methyl 2-bromo-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-4-acetate