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