1: NH2-SAL resin; Fmoc-L-phenylalanine With benzotriazol-1-ol; diisopropyl-carbodiimide in N,N-dimethyl-formamide Rink amide resin; 2: With piperidine in N,N-dimethyl-formamide Rink amide resin; 3: N-(fluoren-9-ylmethoxycarbonyl)-L-Val; N-Fmoc-L-leucine; Fmoc-L-phenylalanine; N-(fluoren-9-ylmethoxycarbonyl)-L-Lys(Nε-Boc) Further stages;