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