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(6R,7S)-7-[[(2R)-2-[[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]-2-(4-hydroxyphenyl)acetyl]amino]-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid1315481-36-732 % similar Cefoperazone62893-19-031 % similar Cefoperazone sodium62893-20-331 % similar Cefpiramide sodium74849-93-731 % similar Cefpiramide70797-11-431 % similar