Piperacillin impurity 8/Piperacillin Dimer impurity 3 Piperacillin dimer Piperacilloic Acid-Piperacillin Dimer DISCONTINUED, offer P480000 (2R,4S)-2-((R)-carboxy((R)-2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetamido)methyl)-3-((2S,5R,6R)-6-((R)-2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carbonyl)-5,5-dimethylthiazolidine-4-carboxylic acid Piperacillin Impurity T Piperacillin Impurity T(EP),Piperacillin Open-Ring Dimer,piperacillin dimer Piperacilloic Acid-Piperacillin Dimer Piperacilin dimer