2-Bromo-5-(difluoromethyl)-6-methylpyridine-3-carboxaldehyde
3-Bromo-6-(chloromethyl)-2-(difluoromethyl)pyridine-5-acetic acid
6-Bromo-3-(difluoromethyl)-4-methylpyridine-2-carboxaldehyde
5-Bromo-2-(chloromethyl)-4-(difluoromethyl)pyridine-3-acetic acid