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