tert-butyl (4R)-4-{(1S)-1-[(tert-butoxycarbonyl)oxy]-2-propenyl}-2-oxo-1,3-oxazolidine-3-carboxylate

(1aR,8aR,9R,9aR)-9-(benzyloxy)octahydro[1,3]oxazolo[3,4-a]oxireno[2,3-d]azocin-6-one