Carfilzomib Impurity 8 (SSSS)

Chemical Name: (S)-N-((S)-1-(((S)-2,6-dimethyl-3-oxohept-1-en-4-yl)amino)-1-oxo-3-phenylpropan-2-yl)-4-methyl-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide

Smile: O=C(C(C)=C)[C@H](CC(C)C)NC([C@@H](NC([C@H](CC(C)C)NC([C@@H](NC(CN1CCOCC1)=O)CCC2=CC=CC=C2)=O)=O)CC3=CC=CC=C3)=O