英文别名BOC-Leu-Phe-O-benzyl; (S)-benzyl 2-((S)-2-(tert-butoxycarbonylamino)-4-methylpentanamido)-3-phenylpropanoate; Carfilzomib Impurity 45; L-Phenylalanine, N-[N-[(1,1-dimethylethoxy)carbonyl]-L-leucyl]-, phenylmethyl ester; Carfilzomib Impurity 53; L-Phenylalanine, N-[(1,1-dimethylethoxy)carbonyl]-L-leucyl-, phenylmethyl ester; Kyprolis Impurity K; Carfilzomib Impurity K 
