116129-01-2
N-(t-butoxycarbonyl)-1-carbomethoxy-2-azabicyclo[2.1.1]hexane
→
116129-04-5
methyl (1s,3s)-1-amino-3-(chlorocarbonyl)cyclobutane-1-carboxylate hydrochloride
116129-05-6
Methyl 3-oxo-2-azabicyclo[2.1.1]hexane-1-carboxylate