(N(alpha)-Acetyl-arg)-(N(epsilon)-acetyl-lys)-glu-val-tyr (N(alpha)-Acetylarginyl)-(N(epsilon)-acetyllysyl)-glutamyl-valyl-tyrosine 91418-71-2 Berlopentin DA SP-5 L-Tyrosine, N-(N-(N-(N6-acetyl-N2-(N2-acetyl-L-arginyl)-L-lysyl)-L-alpha-glutamyl)-L-valyl)-