Octreotide EP Impurity I

Chemical Name: N2.1-Acetyloctreotide (as per EP) ; N-Acetyl-D-phenylalanyl-L-cysteinyl-L-phenylalanyl-D-tryptophyl-L-lysyl-L-threonyl-N-[(1R,2R)-2-hydroxy-1-(hydroxymethyl)propyl]-L-cysteinamide cyclic (2-->7)-disulfide (as per USP)

Synonym: [Phe(Ac)]1-Octreotide (USP)

Smile: O=C([C@H](CSSC[C@H](NC1=O)C(N[C@@H]([C@@H](C)O)CO)=O)NC([C@@H](CC2=CC=CC=C2)NC(C)=O)=O)N[C@H](C(N[C@@H](C(N[C@H](C(N[C@]1([C@@H](C)O)[H])=O)CCCCN)=O)CC3=CNC4=C3C=CC=C4)=O)CC5=CC=CC=C5