Assertion: pyridine | /r/ObjectUse | used for subsequent reaction
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Source sentences:
text: The filtrate was evaporated in a polytetrafluoroethylene container under vacuum, and the obtained residue (2,6-difluoro-4-chlorotetrafluorosulfanyl pyridine (c4), 3.01 g, 90% yield) was used for the subsequent reaction without being purified.