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