97101-07-0
(2R)-2-[(2S,3S)-3-{(1R)-1-(t-butyldimethylsilyloxy)ethyl}-4-oxoazetidin-2-yl]propionic acid
→
105318-05-6
(3S,4S)-1-(tert-butoxycarbonylmethyl)-3-[(1R)-1-tert-butyldimethylsilyloxyethyl]-4-[(1R)-1-carboxyethyl]-2-azetidinone