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