CAS 87726-17-8 Panipenem Chemical Report & Database ... ; (5R,6S)-2-[1-Acetamidoylpyrrolidin-3(S)-ylthio]-6-[1(R)-hydroxyethyl]-2-carbapenem-3-carboxylic acid Synonyms: (5R,6S)-2-[1-Acetamidoylpyrrolidin-3(S)-ylthio]-6-[1(R)-hydroxyethyl]-2-carbapenem-3-carboxylic acid Chemical Registry number ...