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