19843-03-9 5H-Benzo(g)-1,3-benzodioxolo(6,5,4-de)quinoline, 6,7-dihydro-10,11-dimethoxy-7-methyl- 6,7-Dihydro-10,11-dimethoxy-7-methyl-5H-benzo(g)-1,3-benzodioxolo(6,5,4-de)quinoline