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