methyl (2S,5E)-4-oxo-6-phenyl-2-(tert-butoxycarbonylamino)-hex-5-enoate
methyl (2S,5E)-2-(tert-butoxycarbonylamino)-6-(4-bromophenyl)-4-oxohex-5-enoate
methyl (2S,5E)-2-(tert-butoxycarbonylamino)-4-oxo-8-phenyloct-5-enoate
N2-(tert-butoxycarbonyl)-L-ornithine
Boc-Arg(Boc)2OH