{(S)-2-Acetoxy-3-[3-((2S,3S)-3-cyclohexyl-2-hydroxy-3-isobutoxycarbonylamino-propyl)-3-cyclopropylmethyl-ureido]-4-cyclopropyl-butyrylamino}-acetic acid methyl ester

((S)-Cyclohexyl-(R)-oxiranyl-methyl)-carbamic acid tert-butyl ester

DL-苯甘氨酸叔丁酯