(E)-(S)-3-((R)-1-Phenyl-ethylamino)-5-trimethylsilanyl-pent-4-enoic acid

(2E,4E)-5-Trimethylsilanyl-penta-2,4-dienoic acid tert-butyl ester

(S)-1-(tert-Butyl-dimethyl-silanyl)-4-((E)-2-methoxy-vinyl)-azetidin-2-one

(S)-4-((E)-2-Methoxy-vinyl)-1-((R)-1-phenyl-ethyl)-azetidin-2-one

(3S,4R)-3-Acetyl-1-(tert-butyl-dimethyl-silanyl)-4-((E)-2-methoxy-vinyl)-azetidin-2-one