4-Cyano-3-(difluoromethyl)-5-hydroxypyridine-2-carboxylic acid
4-Chloro-3-(difluoromethyl)-2-nitropyridine-5-sulfonamide
2-Cyano-4-(difluoromethyl)-5-fluoro-3-(trifluoromethyl)pyridine
5-Chloro-3-(difluoromethyl)-4-nitropyridine-2-sulfonamide
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