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