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pyrones造句

"pyrones"是什么意思   

例句與造句

  1. Acid-Catalyzed Synthesis of Carbonyl Ylides from Hydroxy-3-Pyrones.
  2. Intramolecular Hydrogen Transfer-Mediated Synthesis of Carbonyl Ylides from 5-Hydroxy-4-Pyrones.
  3. The Gogte Synthesis ( 1938 ) is a method for the alkylation of certain pyrones with acid chlorides.
  4. 5-hydroxy-4-pyrones can also be used to synthesize carbonyl ylides via an intramolecular hydrogen transfer.
  5. Carbonyl ylides can be synthesized by acid catalysis of hydroxy-3-pyrones in the absence of a metal catalyst.
  6. It's difficult to find pyrones in a sentence. 用pyrones造句挺難的

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