3,3-Didemethylpiperacillin 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(((((4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl)amino)phenylacetyl)amino)-7-oxo-, (2S-(2alpha,5alpha,6beta(S*)))- 6-(((((4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl)amino)phenylacetyl)amino)-7-oxo-4-thia-1-azabicyclo(3.2.0) heptane-2-carboxylic acid 81482-39-5