tert-butyl [(3S,4R,5R)-4-hydroxy-5-vinyltetrahydrofuran-3-yl]carbamate

(R)-1-{(4S,5R)-4-[(tert-butyldiphenylsilyloxy)methyl]-2-oxooxazolidin-5-yl}allyl acetate

(4S,5S,6S)-4-[(tert-butyldiphenylsilyloxy)methyl]-2-oxo-6-vinyl-1,3-oxazinan-5-yl acetate