Synonyms: pBC 264;2,3-Propionyl-Tyr(so3H)-gnle-mgly-Trp-(me)nle-Asp-phenh2;L-Phenylalaninamide, 3-oxo-N-(1-((1-oxo-2-((1-oxopropyl-2,2,3,3,3-T5)amino)-3-(4-(sulfooxy)phenyl)propyl)amino)pentyl)-beta-alanyl-L-tryptophyl-N-methyl-L-norleucyl-L-alpha-aspartyl-, (S-(R*,R*))-