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