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