Angustoline

(-)-3,14,15,16,17,18,19,20-Octadehydro-16-(1-hydroxyethyl)-18-azayohimban-21-one

(-)-8,13-Dihydro-1-(1-hydroxyethyl)indolo[2',3':3,4]pyrido[1,2-b][2,7]naphthyridin-5(7H)-one