Cefoperazone EP Impurity A

Chemical Name: (5aR,6R)-6-[[(2R)-2-[[(4-ethyl-2,3-dioxopiperazin-1-yl)carbonyl]amino]-2-(4-hydroxyphenyl)acetyl]amino]-5a,6dihydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazine-1,7(4H)-dione (as per EP)

Smile: O=C1OCC2=C1N3[C@]([C@H](NC([C@H](NC(N4C(C(N(CC)CC4)=O)=O)=O)C5=CC=C(O)C=C5)=O)C3=O)([H])SC2