3-Hydroxy-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride
2-Methoxy-5-nitro-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-Fluoro-4-iodo-3-(methylthio)pyridine
2-(Chloromethyl)-6-(difluoromethyl)-4-fluoro-3-hydroxypyridine
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