| Synonyms: | 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[[[[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]phenylacetyl]amino]-3,3-dimethyl-7-oxo-, 4-oxide, [2S-[2α,4α,5α,6β(S*)]]- (9CI);(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-carboxylic acid 4-oxide;Piperacillin impurity 9/Piperacillin Sulfoxide/Piperacillin Oxide Impurity;(2S,5R,6R)-6-((R)-2-(4-ethyl-2,3-dioxopiperazine;Piperacillin Sulfoxide;Piperacillin EP Impurity U;(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-carboxylic acid 4-oxide?(Piperacillin Impurity);Penicillin Oxidation Impurity |