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