Pyrazolone

3-pyrazolone

5-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

External links

Pyrazolones at the US National Library of Medicine Medical Subject Headings (MeSH)
Pubchem - 3-Pyrazolone
Pubchem - 5-Pyrazolone

Non-steroidal anti-inflammatory drugs (NSAIDs) (primarily M01A and M02A, also N02BA)

Pyrazolones / Pyrazolidines	Aminophenazone Ampyrone Azapropazone Clofezone Famprofazone Feprazone Kebuzone Metamizole Mofebutazone Morazone Nifenazone Oxyphenbutazone Phenazone Phenylbutazone Propyphenazone Sulfinpyrazone Suxibuzone^‡

Salicylates	Aspirin (acetylsalicylic acid)^# Aloxiprin Benorylate Carbasalate calcium Diflunisal Dipyrocetyl Ethenzamide Guacetisal Magnesium salicylate Methyl salicylate Salsalate Salicin Salicylamide Salicylic acid (salicylate) Sodium salicylate

Acetic acid derivatives and related substances	Aceclofenac Acemetacin Alclofenac Amfenac Bendazac Bromfenac Bumadizone Bufexamac Diclofenac Difenpiramide Etodolac Felbinac Fenclozic acid Fentiazac Indomethacin Indomethacin farnesil Ketorolac Lonazolac Oxametacin Prodolic acid Proglumetacin Sulindac Tolmetin Zomepirac^†

Oxicams	Ampiroxicam Droxicam Lornoxicam Meloxicam Piroxicam Tenoxicam

Propionic acid derivatives (profens)	Alminoprofen Benoxaprofen^† Carprofen^‡ Dexibuprofen Dexketoprofen Fenbufen Fenoprofen Flunoxaprofen Flurbiprofen Ibuprofen^# Ibuproxam Indoprofen^† Ketoprofen Loxoprofen Miroprofen Naproxen Oxaprozin Pirprofen Suprofen Tarenflurbil Tepoxalin^‡ Tiaprofenic acid Vedaprofen^‡ COX-inhibiting nitric oxide donator: Naproxcinod

N-Arylanthranilic acids (fenamates)	Azapropazone Etofenamate Flufenamic acid Flunixin Meclofenamic acid Mefenamic acid Morniflumate Niflumic acid Tolfenamic acid Flutiazin

Coxibs	Apricoxib Celecoxib Cimicoxib^‡ Deracoxib^‡ Etoricoxib Firocoxib^‡ Lumiracoxib^† Mavacoxib^‡ Parecoxib Robenacoxib^‡ Rofecoxib^† Valdecoxib^†

Other	Aminopropionitrile Benzydamine Chondroitin sulfate Diacerein Fluproquazone Glucosamine Glycosaminoglycan Hyperforin Nabumetone Nimesulide Oxaceprol Proquazone Superoxide dismutase/Orgotein Tenidap

Items listed in bold indicate initially developed compounds of specific groups. ^#WHO-EM ^†Withdrawn drugs. ^‡Veterinary use medications.

Authority control	NDL: 00576655

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