1-hydroxy-2,10,11-trimethoxy-6-methyl-4H-dibenzo[de,g]quinoline-4,5(6H)-dione 4H-dibenzo[de,g]quinoline-4,5(6H)-dione, 1-hydroxy-2,10,11-trimethoxy-6-methyl- InChI=1/C20H17NO6/c1-21-11-7-9-5-6-12(25-2)19(27-4)14(9)16-15(11)10(17(22)20(21)24)8-13(26-3)18(16)23/h5-8,23H,1-4H