Piperacillin EP Impurity K

Chemical Name: (2Ξ)-2-[[(E)-[2-[(R)-[(4-ethyl-2,3-dioxopiperazine-1-carboxamido)phenylmethyl]-5-oxo-1,3-oxazol-4(5H)-ylidene]methyl]amino]-3-methyl-3-sulfanylbutanoic acid (penicillenic acid) (as per EP)

Smile: O=C(N1C(C(N(CC)CC1)=O)=O)N[C@@H](C2=N/C(C(O2)=O)=C/NC(C(C)(S)C)C(O)=O)C3=CC=CC=C3