Piperacillin EP Impurity R

Chemical Name: (2S,5R,6R)-6-[(2R)-2-[(2Ξ)-2-[(2Ξ,4S)-4-carboxy-5,5-dimethyl-1,3-thiazolidin-2-yl]-2-[(2R)-2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetamido]acetamido]-2-phenylacetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid (as per EP)

Smile: OC([C@H](NC([C@H](NC([C@@H](C1=CC=CC=C1)NC(N2CCN(C(C2=O)=O)CC)=O)=O)C(N[C@@H](C(N[C@]3([C@@]4([H])SC(C)([C@@H](N4C3=O)C(O)=O)C)[H])=O)C5=CC=CC=C5)=O)S6)C6(C)C)=O