4-乙酰氧基氮杂环丁酮

allyl 2-oxocyclohex-3-ene-1-carboxylate

1-{(2S,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-2-oxo-cyclohex-3-enecarboxylic acid allyl ester

((1R,4R)-4-{(2R,3S)-1-(tert-Butyl-dimethyl-silanyl)-3-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-3-oxo-cyclohexyl)-acetaldehyde

(3S,4R)-1-(tert-Butyl-dimethyl-silanyl)-3-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-[(1R,4R)-4-(2-methoxy-ethyl)-2-oxo-cyclohexyl]-azetidin-2-one