Cobicistat Pyrrolidinone Impurity

Chemical Name: Thiazol-5-ylmethyl ((2R,5R)-5-((3S)-5-hydroxy-3-(3-((2-isopropylthiazol-4-yl)methyl)-3-methylureido)-2-oxopyrrolidin-1-yl)-1,6-diphenylhexan-2-yl)carbamate

Smile: O=C(OCC1=CN=CS1)N[C@H](CC[C@@H](N2C([C@@H](NC(N(CC3=CSC(C(C)C)=N3)C)=O)CC2O)=O)CC4=CC=CC=C4)CC5=CC=CC=C5