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The key intermediate for the production of a major part of the cephalosporins such as: Cefazolin, Ceftriaxone, Cefotaxime, Cefuroxime, Cefixime, Cefotetan etc.

Name: 7-Aminocephalosporanic acid

Synonyms: 7-ACA; (6R, 7S)-3-(Acetyloxymethyl)-7-amino-8-oxo-5-thia-1-azabicyclo[4. 2. 0]oct-2-ene-2-carboxylic acid

Molecular Formula: C₁₀H₁₂N₂O₅S

Molecular Weight: 272. 27

CAS Registry Number: 957-68-6