{(S)-1-[((S)-1-Carbamoyl-3-methylsulfanyl-propyl)-methyl-carbamoyl]-2-phenyl-ethyl}-carbamic acid tert-butyl ester 生成 [(S)-1-{(R)-1-[({(S)-1-[((S)-1-Carbamoyl-3-methylsulfanyl-propyl)-methyl-carbamoyl]-2-phenyl-ethylcarbamoyl}-methyl)-carbamoyl]-ethylcarbamoyl}-2-(4-hydroxy-phenyl)-ethyl]-carbamic acid tert-butyl ester