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