3-(Difluoromethyl)-2-methoxy-6-nitropyridine-4-carboxaldehyde
2-(Difluoromethyl)-6-methoxy-3-nitro-5-(trifluoromethyl)pyridine
2-(Difluoromethyl)-5-methoxy-6-nitro-3-(trifluoromethyl)pyridine
6-(Difluoromethyl)-3-methoxy-4-nitro-2-(trifluoromethyl)pyridine