4-Fluoro-3-methoxy-2-(trifluoromethoxy)pyridine-5-carboxylic acid
3-Cyano-2-methoxy-5-(trifluoromethoxy)pyridine-4-acetic acid
2-Cyano-6-methoxy-4-(trifluoromethoxy)pyridine-3-acetic acid
4-Fluoro-6-methoxy-3-(trifluoromethoxy)pyridine-2-carboxylic acid