2-Amino-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-4-acetic acid
5-Bromo-2-fluoro-4-(trifluoromethoxy)pyridine-3-acetic acid
2-Amino-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-acetic acid
4-Bromo-5-fluoro-2-(trifluoromethoxy)pyridine-3-acetic acid