benzyl (3aS,7aS)-2-hydroxy-2-[(4-oxo-3(4H)-quinazolinyl)methyl]hexahydrofuro[3,2-b]pyridine-4(2H)-carboxylate

(2R,3S)-3-benzyloxy-2-methoxy-3,6-dihydro-2H-pyran

2,3-cis-3-benzyloxy-1-benzyloxycarbonyl-2-[2-oxo-3-(4-oxo-4H-quinazolin-3-yl)propyl]piperidin

Benzyl 2-allyl-3-oxo-1-piperidinecarboxylate

benzyl (2S,3S)-2-allyl-3-hydroxypiperidine-1-carboxylate