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