3-Fluoro-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-5-carboxylic acid
6-Fluoro-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-carboxylic acid
6-Fluoro-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-2-carboxylic acid
2-Fluoro-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-carboxylic acid