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