| (R)-4-(benzyloxycarbonylamino)tetrahydrofuran-2-one |
| (R)-β-(cbz-amino)-γ-butyrolactone |
| (R)-4-(carbobenzoxyamino)tetrahydrofuran-2-one |
| (R)-4-(cbz-amino)tetrahydrofuran-2-one |
| benzyl (R)-tetrahydro-5-oxo-3-furanylcarbamate |
| (R)-β-(benzyloxycarbonylamino)-γ-butyrolactone |
| (R)-β-(carbobenzoxyamino)-γ-butyrolactone |