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