1'-(4-(Methylamino)butyl)-3,4-dihydrospiro(naphthalene-1(2H),3'-pyrrolidine)-2',5'-dione 74246-94-9 BRN 1546742 Spiro(naphthalene-1(2H),3'-pyrrolidine)-2',5'-dione, 3,4-dihydro-1'-(4-(methylamino)butyl)-, (+-)-