Methyl 4-bromo-2-cyano-3-(difluoromethyl)pyridine-6-acetate
2-Bromo-4-cyano-3-(difluoromethyl)pyridine-6-sulfonyl chloride
Methyl 3-bromo-6-cyano-2-(difluoromethyl)pyridine-4-acetate
Methyl 4-bromo-5-cyano-2-(difluoromethyl)pyridine-3-acetate
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