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