2-(Difluoromethyl)-5-methoxy-3-nitropyridine-6-carboxaldehyde
2-(Difluoromethyl)-4-methyl-3-nitropyridine-6-carboxylic acid
6-(Difluoromethyl)-4-methoxy-2-nitropyridine-3-carboxaldehyde
2-(Difluoromethyl)-3-methyl-6-nitropyridine-5-carboxylic acid
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