3-Hydroxy-2-methoxy-6-(trifluoromethoxy)pyridine-4-carboxaldehyde
5-(Difluoromethyl)-2-fluoro-4-nitro-3-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-5-fluoro-2-nitro-3-(trifluoromethoxy)pyridine
3-(Difluoromethyl)-5-fluoro-4-nitro-2-(trifluoromethoxy)pyridine