Ethyl 2-(difluoromethyl)-6-methyl-3-nitropyridine-4-carboxylate
Methyl 3-(difluoromethyl)-6-methyl-4-nitropyridine-2-acetate
Methyl 5-(difluoromethyl)-2-methyl-3-nitropyridine-6-acetate
Methyl 4-(difluoromethyl)-5-methyl-2-nitropyridine-3-acetate
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