benzyl 1-(bis(4-acetamidophenoxy)phosphoryl)-2-(4-amino-phenyl)ethylcarbamate

[(N-benzyloxycarbonyl-O-tert-butyl)-D-seryl]-L-alanine

di(4-acetamidophenyl) 1-amino-2-{4-[N,N'-bis(tert-butyloxycarbonyl)guanidino]phenyl}ethanephosphonate

di-(4-acetamidophenyl)-1-(benzyloxycarbonylamino)-2-(4-tert-butyloxycarbonylaminophenyl)ethanephosphonate

benzyl 1-(bis(4-acetamidophenoxy)phosphoryl)-2-(4-(N,N'-bis(tert-butyloxycarbonyl)guanidino)phenyl)ethylcarbamate