tert-Butyl 2-oxo-1,2-dihydrospiro[benzo[d][1,3]oxazine-4,3'-pyrrolidine]-1'-carboxylate 1g

tert-Butyl 2-oxo-1,2-dihydrospiro[benzo[d][1,3]oxazine-4,3'-pyrrolidine]-1'-carboxylate 1g