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