1-(2-Dimethylaminoethyl)-1,5,9-trimethyl-1,3,4,9-tetrahydropyrano(3,4-b)indole maleate 57791-11-4 Pyrano(3,4-b)indole, 1,3,4,9-tetrahydro-1-(2-(dimethylamino)ethyl)-1,5,9-trimethyl-, maleate