(S)-3-Phenethyl-1-(3-phenyl-propyl)-piperazine-2,5-dione

[((S)-2-tert-Butoxycarbonylamino-4-phenyl-butyryl)-(3-phenyl-propyl)-amino]-acetic acid methyl ester

[(S)-3,6-Dioxo-2-phenethyl-4-(3-phenyl-propyl)-piperazin-1-yl]-acetic acid tert-butyl ester

N-Boc-L-高苯丙氨酸

methyl 2-((3-phenylpropyl)amino)acetate