2-methoxy-5-(4-methoxyphenyl)-8,8-dimethyl-5,8,9,10-tetrahydropyrimido[4,5-b]quinoline-4,6(3H,7H)-dione InChI=1/C21H23N3O4/c1-21(2)9-13-16(14(25)10-21)15(11-5-7-12(27-3)8-6-11)17-18(22-13)23-20(28-4)24-19(17)26/h5-8,15H,9-10H2,1-4H3,(H2,22,23,24,26 pyrimido[4,5-b]quinoline-4,6(3H,7H)-dione, 5,8,9,10-tetrahydro-2-methoxy-5-(4-methoxyphenyl)-8,8-dimethyl-