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