2-Cyano-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
4-Iodo-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Bromo-4-nitropicolinonitrile
3-(Difluoromethyl)-2-nitro-6-(trifluoromethyl)pyridine-5-sulfonyl chloride
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