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