英文别名(2R,4S)-2-((R)-carboxy((R)-2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetamido)methyl)-5,5-dimethylthiazolidine-4-carboxylic acid; (2R,4S)-2-[(R)-Carboxy{[(2R)-2-{[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino}-2-phenylacetyl]amino}methyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid; (2R,4S)-2-[(R)-carboxy-[[(2R)-2-[(4-ethyl-2,3-dioxopiperazine-1-carbonyl)amino]-2-phenylacetyl]amino]methyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid; Piperacillin Impurity 2 
