3-(Difluoromethyl)-2-fluoro-5-methoxypyridine-4-sulfonyl chloride
2-(Difluoromethyl)-6-fluoro-4-methoxypyridine-3-sulfonyl chloride
4-Chloro-5-methoxypyridine-2-sulfonyl chloride
3-Chloro-4-methoxypyridine-5-sulfonyl chloride
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