D-Cys Carbetocin Impurity

Chemical Name: (S)-1-((3S,6S,9S,12S,15S)-6-(2-Amino-2-oxoethyl)-9-(3-amino-3-oxopropyl)-12-((S)-sec-butyl)-15-(4-methoxybenzyl)-5,8,11,14,17-pentaoxo-1-thia-4,7,10,13,16-pentaazacycloicosane-3-carbonyl)-N-((S)-1-((2-amino-2-oxoethyl)amino)-4-methyl-1-oxopentan-2-yl)pyrrolidine-2-carboxamide

Smile: COC1=CC=C(C[C@H](NC2=O)C(N[C@]([C@@H](C)CC)([H])C(N[C@](CCC(N)=O)([H])C(N[C@@H](CC(N)=O)C(N[C@@H](C(N3CCC[C@H]3C(N[C@@H](CC(C)C)C(NCC(N)=O)=O)=O)=O)CSCCC2)=O)=O)=O)=O)C=C1