Ethyl 2-(difluoromethyl)-5-nitropyridine-4-acetate
4-(Chloromethyl)-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-acetic acid
3-Bromo-2-(difluoromethyl)pyridine-4-carboxaldehyde
4-(Chloromethyl)-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-acetic acid