Piperacillin Impurity 4

Chemical Name: ethyl (2S,6R)-6-((2R)-2-((2S,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-carboxamido)-2-phenylacetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate

Smile: O=C1N(C(N[C@@H](C(N[C@@H](C2N3[C@@H](C(N[C@@H](C(N[C@@H]4C(N5C4SC(C)(C)[C@@H]5C(OCC)=O)=O)=O)C6=CC=CC=C6)=O)C(C)(C)S2)C3=O)=O)C7=CC=CC=C7)=O)CCN(CC)C1=O