1 6A1 Hydroxy(2-{[(5s)-6-hydroxy-8-methoxy-4,5-dihydro-3h-imidazo[4,5,1-de]acridin-5-yl]amino}ethyl)dimethylammonium 1.000 2 TE7 5-{[2-(dimethylamino)ethyl]amino}-8-methoxy-6h-imidazo[4,5,1-de]acridin-6-one 0.962