Methyl 2-(difluoromethyl)-3-nitropyridine-4-carboxylate
Methyl 4-bromo-5-(difluoromethyl)pyridine-2-acetate
Methyl 4-bromo-2-(difluoromethyl)pyridine-6-acetate
5-(Difluoromethyl)-2-nitropyridine-3-carboxylic acid
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