KRAKAKTTKKR

N=C(N)NCCC[C@@H](C(O)=O)NC([C@H](CCCCN)NC([C@H](CCCCN)NC([C@H]([C@H](O)C)NC([C@H]([C@H](O)C)NC([C@H](CCCCN)NC([C@H](C)NC([C@H](CCCCN)NC([C@H](C)NC([C@H](CCCNC(N)=N)NC([C@@H](N)CCCCN)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O

[1]Grode SH, et al. Hydrogen fluoride catalyzed migration of side chain protecting groups onto Fmoc during solid phase peptide synthesis. Characterization by CF-FAB analysis of carboxypeptidase digestions and NMR spectroscopy. Int J Pept Protein Res. 1992 Dec;40 (6) :538-45.