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