Ethyl 4-amino-2-bromo-5-(difluoromethyl)pyridine-3-carboxylate
2-(Difluoromethyl)-4,5-diiodopyridine-3-sulfonyl chloride
Ethyl 5-amino-3-bromo-2-(difluoromethyl)pyridine-4-carboxylate
3-(Difluoromethyl)-4,5-diiodopyridine-2-sulfonyl chloride
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