Leuprolide Acetate Impurity K

Chemical Name: (S)-1-((3S,6S,12S,15R,18S,21S)-3-((1H-imidazol-5-yl)methyl)-6-((1H-indol-3-yl)methyl)-21-(3-guanidinopropyl)-12-(4-hydroxybenzyl)-15,18-diisobutyl-9-methylene-1,4,7,10,13,16,19-heptaoxo-1-((S)-5-oxopyrrolidin-2-yl)-2,5,8,11,14,17,20-heptaazadocosan-22-oyl)-N-ethylpyrrolidine-2-carboxamide

Smile: O=C([C@H]1N(C([C@H](CCCNC(N)=N)NC([C@H](CC(C)C)NC([C@@H](CC(C)C)NC([C@H](CC2=CC=C(O)C=C2)NC(C(NC([C@H](CC3=CNC4=C3C=CC=C4)NC([C@H](CC5=CN=CN5)NC([C@H](CC6)NC6=O)=O)=O)=O)=C)=O)=O)=O)=O)=O)CCC1)NCC