3-Hydroxy-6-nitro-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
3-(Difluoromethyl)-4-hydroxy-2-(trifluoromethoxy)-5-(trifluoromethyl)pyridine
6-Hydroxy-3-nitro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Hydroxy-3-nitro-5-(trifluoromethoxy)pyridine-2-carboxaldehyde