2-Fluoro-3-(difluoromethyl)-4-hydroxy-5-(trifluoromethoxy)pyridine
3-Fluoro-6-(fluoromethyl)-4-hydroxy-2-(trifluoromethoxy)pyridine
4-Fluoro-6-methyl-3-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Fluoro-2-methyl-3-(trifluoromethoxy)pyridine-5-carboxylic acid