17929-96-3 5H-Cyclooct(b)indole, 6,7,8,9,10,11-hexahydro-5-(2-(dimethylamino)ethyl)-, fumarate (1:1) 6,7,8,9,10,11-Hexahydro-5-(2-(dimethylamino)ethyl)-5H-cyclooct(b)indole fumarate