3-Hydroxy-2-methoxy-4-(trifluoromethoxy)pyridine-6-carboxylic acid
2-Hydroxy-6-methoxy-5-(trifluoromethoxy)pyridine-3-carboxylic acid
2-(Chloromethyl)-6-fluoro-5-(trifluoromethoxy)pyridine-3-carboxylic acid
2-(Chloromethyl)-6-fluoro-3-(trifluoromethoxy)pyridine-5-carboxylic acid