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