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