Carfilzomib Impurity 1 (RSSSS)

Chemical Name: 2-Hydroxy-2-({[(4S)-2-hydroxy-2,6-dimethyl-4-[(2S)-2-[(2S)-4-methyl-2-[(2S)-2-[2-(morpholin-4-yl)acetamido]-4-phenylbutanamido]pentanamido]-3-phenylpropanamido]-3-oxoheptyl]oxy}carbonyl)butanedioic acid

Synonym: Tizanidine USP Related Compound A

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