Carfilzomib Impurity 12 (SRSSS)

Chemical Name: (R,S)-Epoxy Leucine Carfilzomib ; (S)-4-methyl-N-((S)-1-(((R)-4-methyl-1-((S)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide