Carfilzomib Impurity 2 (RSSSS)

Chemical Name: (αS)​-​α-​[[2-​(4-​Morpholinyl)​acetyl]​amino]​benzenebutanoyl-​L-​leucyl-​N-​[(1S,​3R)​-​3,​4-​dihydroxy-​3-​methyl-​1-​(2-​methylpropyl)​-​2-​oxobutyl]​-L-​phenylalaninamide;

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