1H-Indole, 4-(1,2,5,6-tetrahydro-1-propyl-3-pyridinyl)-, (E)-2-butenedioate (1:1) 4-(1,2,5,6-Tetrahydro-1-propyl-3-pyridinyl)-1H-indole (E)-2-butenedioate (1:1) 4-(1-Propyl-1,2,5,6-tetrahydropyridin-3-yl)-1H-indole fumarate 77801-73-1