Ethyl 4-cyano-3-(difluoromethyl)-6-nitropyridine-2-acetate
4-Cyano-3-(difluoromethyl)-6-nitropyridine-2-sulfonyl chloride
3-Cyano-4-(difluoromethyl)-2-nitropyridine-6-sulfonyl chloride
2-Cyano-6-(difluoromethyl)-5-methoxypyridine-3-sulfonyl chloride
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