[(2-Oxo-propylcarbamoyl)-phenyl-methyl]-carbamic acid tert-butyl ester

(6R,7R)-7-(2-tert-Butoxycarbonylamino-2-phenyl-acetylamino)-8-oxo-3-(1-trityl-1H-[1,2,3]triazol-4-ylsulfanylmethylsulfanyl)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester

1-(tert-butoxycarbonylamino)-1-phenylundecan-2-one