54783-72-1
ethyl (S)-2-(benzyloxy)propionate
→
115026-45-4
(3S,4S)-4-[(S)-1-benzyloxyethyl]-3-[(R)-(1-t-butyldimethylsilyloxy)ethyl]-2-azetidinone
112256-72-1
(3S,4R)-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl-4-vinyl-2-azetidinone]
115075-47-3
(3S,4S)-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-4-[(S)-1-hydroxyethyl]-2-azetidinone