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