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pyrazolone derivative

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.Examples of derivatives include: * Ampyrone * Metamizole * Phenazone * PhenylbutazoneExternal links* … Wikipedia
apazone — ap·a·zone (apґə zōn) a pyrazolone derivative having antiinflammatory, analgesic, antipyretic, and uricosuric effects; used for treatment of rheumatoid arthritis, osteoarthritis, and gout. Called also azapropazone … Medical dictionary
phenylbutazone — /fɛnəlˈbjutəzoʊn/ (say fenuhl byoohtuhzohn) noun a synthetic pyrazolone derivative, C19H20N2O2, used as an anti inflammatory drug …
analgesic — /an l jee zik, sik/, Med. n. 1. a remedy that relieves or allays pain. adj. 2. of, pertaining to, or causing analgesia. [1870 75; ANALGES(IA) + IC] * * * Drug that relieves pain without blocking nerve impulse conduction or markedly altering… … Universalium