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