Methyl 6-(difluoromethyl)-2-methoxy-4-nitropyridine-3-acetate
Methyl 2-(difluoromethyl)-6-methoxy-3-nitropyridine-5-acetate
3-(Difluoromethyl)-6-methyl-2-nitropyridine-4-carbonyl chloride
3-(Difluoromethyl)-6-methyl-4-nitropyridine-2-carbonyl chloride