Cetrorelix Impurity 24

AC-3- (2-naphthyl) -D-Ala-4-Cl-D-Phe-3- (3-Pyridyl) -D-Ala-Ser-Tyr-D-Cit-Leu-Cit-Pro-D-Ala-NH2; (S) -N- ((R) -1-amino-1-oxopropan-2-yl) -1- ((2S,5S,8R,11S,14S,17R,20R,23R) -20- (4-chlorobenzyl) -11- (4-hydroxybenzyl) -14- (hydroxymethyl) -5-isobutyl-23- (naphthalen-2-ylmethyl) -4,7,10,13,16,19,22,25-octaoxo-17- (pyridin-3-ylmethyl) -2,8-bis (3-ureidopropyl) -3,6,9,12,15,18,21,24-octaazahexacosanoyl) pyrrolidine-2-carboxamide