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