Ethyl 4-(chloromethyl)-3-iodo-2-(trifluoromethoxy)pyridine-6-carboxylate
2-(Difluoromethyl)-5-methoxy-3-nitropyridine-6-sulfonyl chloride
4-Chloro-6-(difluoromethyl)-3-methoxypyridine-2-sulfonyl chloride
4-Chloro-2-iodo-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride