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