{(R)-1-[(S)-1-((S)-1-{[(1S,2R)-1-Benzyl-2-(tert-butyl-dimethyl-silanyloxy)-4-oxo-butyl]-methyl-carbamoyl}-2-methyl-propylcarbamoyl)-ethyl]-octyl}-carbamic acid benzyl ester

(2S,3R)-3-Hydroxy-2-methyl-decanoic acid (S)-1-{[(1S,2R)-1-benzyl-2-(tert-butyl-dimethyl-silanyloxy)-pent-4-enyl]-methyl-carbamoyl}-2-methyl-propyl ester

(2S,3R)-3-Hydroxy-2-methyl-decanoic acid (S)-1-{[(1S,2R)-1-benzyl-2-(tert-butyl-dimethyl-silanyloxy)-3-carboxy-propyl]-methyl-carbamoyl}-2-methyl-propyl ester

(2S,3R)-3-(4-Methoxy-benzyloxy)-2-methyl-decanoic acid (S)-1-{[(1S,2R)-1-benzyl-2-(tert-butyl-dimethyl-silanyloxy)-pent-4-enyl]-methyl-carbamoyl}-2-methyl-propyl ester

(2S,5S,6R,10R,11S)-5-Benzyl-6-(tert-butyl-dimethyl-silanyloxy)-10-heptyl-2-isopropyl-4,11-dimethyl-1,9-dioxa-4-aza-cyclododecane-3,8,12-trione