1-(3-Methylaminopropyl)-1,9-dimethyl-1,3,4,9-tetrahydropyrano(3,4-b)indole maleate 57791-06-7 Pyrano(3,4-b)indole, 1,3,4,9-tetrahydro-1,9-dimethyl-1-(3-(methylamino)propyl)-, maleate