3-((1S,2S,4aR,6S,8aS)-2,6-Dimethyl-1,2,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-3-oxo-propionic acid methyl ester

(R)-3-[(1S,2R,5S,6R)-2,5-Bis-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[4.1.0]hept-2-yl]-1-(4-methoxy-benzyloxy)-azetidin-2-one

(R)-2-[(1S,2R,5S,6R)-2,5-Bis-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[4.1.0]hept-2-yl]-3-(4-methoxy-benzyloxyamino)-propionic acid allyl ester

(R)-2-[(1S,2R,5S,6R)-2,5-Bis-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[4.1.0]hept-2-yl]-3-[[3-((1S,2S,4aR,6S,8aS)-2,6-dimethyl-1,2,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-3-oxo-propionyl]-(4-methoxy-benzyloxy)-amino]-propionic acid allyl ester

(R)-2-[(1S,2R,5S,6R)-2,5-Bis-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[4.1.0]hept-2-yl]-3-[[3-((1S,2S,4aR,6S,8aS)-2,6-dimethyl-1,2,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-3-oxo-propionyl]-(4-methoxy-benzyloxy)-amino]-propionic acid