(3S,4R)-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-[(1R,3S)-3-methoxy-2-oxocyclohexyl]azetidin-2-one
(3S,4R)-3-[(R)-1-(terc-butildimetilsililoxi)etil]-4-[(1R,3S)-3-metoxi-2-oxociclohexil]azetidin-2-ona