1-Acetyl-1'-methylspiro(indoline-3,3'-pyrrolidine) 1-Acetyl-1,2-dihydro-1'-methylspiro(3H-indole-3,3'-pyrrolidine) 5-23-07-00029 (Beilstein Handbook Reference) 64158-05-0 BRN 0916922 Spiro(indoline-3,3'-pyrrolidine), 1-acetyl-1'-methyl-