2-(Difluoromethyl)-6-hydroxy-4-nitro-3-(trifluoromethoxy)pyridine
3-(Bromomethyl)-6-fluoro-2-(trifluoromethoxy)pyridine-5-carboxylic acid
4-Hydroxy-5-methoxy-3-nitro-2-(trifluoromethoxy)pyridine
4-Hydroxy-3-methoxy-2-nitro-5-(trifluoromethoxy)pyridine