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