3,4-Difluoro-5-(trifluoromethoxy)pyridine-2-acetic acid
3-(Difluoromethyl)-2-methyl-5-(trifluoromethoxy)pyridine-6-acetic acid
3,4-Difluoro-2-(trifluoromethoxy)pyridine-5-acetic acid
3-(Difluoromethyl)-2-methyl-4-(trifluoromethoxy)pyridine-5-acetic acid