CAS No.: 110764-35-7 Synonyms: (6 R ,7 R )-7-[( S )-2-Amino-2-(4-hydroxyphenyl)acetamido]-8-oxo-3-[( Z )-prop-1-enyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Formula: C₁₈H₁₉N₃O₅S Formula Weight: 389.43 Linear Formula: C₁₈H₁₉N₃O₅S