1 09B 4-cyanobenzyl (3s,5'R)-2-oxo-1,2-dihydrospiro[indole-3,3'-pyrrolidine]-5'-carboxylate 1.000 2 09G 3-bromo-4-cyanobenzyl (3s,5'R)-2-oxo-1,2-dihydrospiro[indole-3,3'-pyrrolidine]-5'-carboxylate 0.963 3 09A Benzyl (3s,5'R)-2-oxo-1,2-dihydrospiro[indole-3,3'-pyrrolidine]-5'-carboxylate 0.923