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