Ethyl 3-bromo-2-(difluoromethyl)-4-iodopyridine-6-carboxylate
Ethyl 2-bromo-6-(difluoromethyl)-3-iodopyridine-5-carboxylate
4-Bromo-6-cyano-2-(difluoromethyl)pyridine-3-carboxylic acid
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