Ethyl 4-fluoro-3-(fluoromethyl)-6-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 4-fluoro-3-(fluoromethyl)-2-(trifluoromethoxy)pyridine-6-carboxylate
4-(Difluoromethyl)-5-fluoro-3-(trifluoromethoxy)pyridine-2-acetic acid
4-(Difluoromethyl)-3-fluoro-2-(trifluoromethoxy)pyridine-5-acetic acid