Ethyl 6-chloro-4-hydroxynicotinate
2-(Difluoromethyl)-3-methoxy-5-nitropyridine-6-sulfonyl chloride
3-Amino-5-(difluoromethyl)-6-iodopyridine-2-sulfonamide
3-(Chloromethyl)-6-(difluoromethyl)-4-(trifluoromethyl)pyridine-2-sulfonyl chloride
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