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Pyrazolone

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Pyrazolone

Pyrazolone, a five-membered-ring lactam, is a derivative of pyrazole that has an additional keto (=O) group. It has a molecular formula of C3H4N2O. There are three possible isomers: 3-pyrazolone, 4-pyrazolone, and 5-pyrazolone.

Examples of derivatives include:

  • Ampyrone, a pharmaceutical
  • Metamizole, a pharmaceutical used as an analgesic, antispasmodic, antipyretic
  • Pigment Yellow 10, a yellow colorant
  • Phenidone, a dihydropyrazolone

    • References

    Pyrazolone Wikipedia
    (Text) CC BY-SA