6-Bromo-5-mercaptopicolinonitrile
2-(Bromomethyl)-4-chloro-5-(difluoromethyl)pyridine-3-carboxaldehyde
2-Fluoro-4-iodo-6-(methylthio)pyridine
6-(Difluoromethyl)-4-methoxy-2-(trifluoromethyl)pyridine-3-carboxaldehyde
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