3-Bromo-5-(difluoromethyl)-2-nitropyridine-4-acetic acid
5-Bromo-4-(chloromethyl)-2-(difluoromethyl)-3-nitropyridine
3-Bromo-4-(difluoromethyl)-6-nitropyridine-2-acetic acid
5-Bromo-2-(difluoromethyl)-4-(trifluoromethyl)pyridine-3-acetic acid
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