(S)-2-((S)-9-Benzyloxycarbonylmethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-4-(tetrahydro-pyran-4-yl)-butyric acid ethyl ester

1,6-dibromo-3-(2-bromo-ethyl)-hexane