2-Bromo-3-(difluoromethyl)-5-(fluoromethyl)pyridine
3-Bromo-6-(chloromethyl)-2-(difluoromethyl)pyridine
4-Bromo-3-(chloromethyl)-5-(difluoromethyl)pyridine
4-Bromo-2-(chloromethyl)-3-(difluoromethyl)pyridine
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