1-Acetyl-1,2-dihydrospiro(3H-indole-3,3'-pyrrolidine) oxalate (4:3) 1-Acetylspiro(indoline-3,3'-pyrrolidine) oxalate (4:3) 64158-08-3 Spiro(indoline-3,3'-pyrrolidine), 1-acetyl-, oxalate (4:3)