Figure 2: Scheme of the synthesis of N-protected amino acids derivatives. It is used in the case a δ-Boc-protected L-Ornithine: H-Orn(Boc)-OR2 as an amino acyl component. In the case of Fmoc-group and Z-group – p-nitrophenyl activated esters: Fmoc-ONP (Fmoc-ONp) and Z-ONP (Z-ONp), as well as pentachlorophenyl esters: Fmoc-OPcp, Z-OPcp were also employed, whereas everyone of the protected groups were also introduced by their 1-(benzotriazole-1-yl) (hydroxybenzotriazole-1-yl; 1-hydroxy benzotriazole) activated ester: Fmoc-OBt, Z-OBt, Bz(NO2)-OBt*.