4-Bromo-2-fluoropyridine-6-sulfonyl chloride
6-Nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-carbonyl chloride
4-(Difluoromethyl)-3-hydroxy-6-nitropyridine-2-sulfonyl chloride
2-Amino-4-iodo-5-(trifluoromethoxy)pyridine-3-carbonyl chloride