90024-54-7
(E)-4-{(2R,3S)-1-(tert-Butyl-dimethyl-silanyl)-3-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-but-2-enal
86279-91-6
(3S,4R)-1-(tert-Butyl-dimethyl-silanyl)-3-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-((E)-4-iodo-but-2-enyl)-azetidin-2-one
96326-26-0
(+)-3α-<(1R)-1-<(tert-butyldimethylsilyl)oxy>ethyl>-4β-<3-<<(p-nitrobenzyl)oxy>carbonyl>-2,2-(ethylenedioxy)propyl>azetidin-2-one
87641-51-8
(3S,4R)-3-<(1R)-1-<(tert-Butyldimethylsilyl)oxy>ethyl>-4-<3-(p-nitrobenzyloxycarbonyl)-2-oxopropyl>azetidin-2-one
75321-05-0
(3S,4R)-1-(tert-Butyldimethylsilyl)-3-<(1R)-1-hydroxyethyl>-4-(carboxymethyl)azetidin-2-one