p-nitrophenyl 13-benzyloxycarbonylamino-8-oxo-7-azatridecanoate

13-tert-butyloxycarbonylamino-8-oxo-7-azatridecanoic acid

p-nitrophenyl 13-tert-butyloxycarbonylamino-8-oxo-7-azatridecanoate

6-(6-aminohexanoylamino)hexanoic acid

氯甲酸乙酯