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