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