Cilengitide; 2-((2S,5R,8S,11S)-5-benzyl-11-(3-guanidinopropyl)-8-isopropyl-7-methyl-3,6,9,12,15-pentaoxo-1,4,7,10,13-pentaazacyclopentadecan-2-yl)acetic acid; CAS No.: 188968-51-6; As a chemical synthesis company, ChemShuttle provides 2-((2S,5R,8S,11S)-5-benzyl-11-(3-guanidinopropyl)-8-isopropyl-7-methyl-3,6,9,12,15-pentaoxo-1,4,7,10,13-pentaazacyclopentadecan-2-yl)acetic acid, a complex macrocyclic peptide for protease inhibition. The compound s constrained structure mimics natural protease inhibitors. Their expertise in peptide cyclization supports innovative therapeutic development.