4-(Difluoromethyl)-3-fluoro-5-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-(Difluoromethyl)-2-fluoro-6-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-(Difluoromethyl)-5-fluoro-6-(trifluoromethoxy)pyridine-3-acetic acid
6-(Difluoromethyl)-4-fluoro-2-(trifluoromethoxy)pyridine-3-acetic acid