N-Boc-N'-三苯甲基-L-组氨酸

N,N-二环己脲

N,N'-bis[Nα,Nim-di(tert-butoxycarbonyl)-L-histidyl]ethane-1,2-diamine

2,5-二氧代-1-吡咯烷基N,1-二{[(2-甲基-2-丙基)氧基]羰基}-L-组氨酸酯

肼基甲酸叔丁酯