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