1-(4',5'-Dimethoxy-3'-oxo-1',3'-dihydroisobenzofuran-1'-yl)-6,7-dimethoxycinnolin-4(1H)-one 6,7-Dimethoxy-1-(1,3-dihydro-4,5-dimethoxy-3-oxoisobenzofuran-1-yl)cinnolin-4(1H)-one 81023-06-5 BRN 5169787 CINNOLIN-4(1H)-ONE, 1-(1,3-DIHYDRO-4,5-DIMETHOXY-3-OXOISOBENZOFURAN-1-YL)-6,7-DI Cinnolin-4(1H)-one, 1-(1,3-dihydro-4,5-dimethoxy-3-oxoisobenzofuran-1-yl)-6,7-dimethoxy-