Methyl 2-bromo-3-(chloromethyl)-5-(difluoromethyl)pyridine-6-acetate
Ethyl 2-bromo-5-(difluoromethyl)-4-nitropyridine-3-acetate
4-Bromo-2-(difluoromethyl)-3-nitropyridine-5-sulfonyl chloride
3-Bromo-5-(difluoromethyl)-6-nitropyridine-2-sulfonyl chloride