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