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