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