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