SEARCH Articles Figures Tables 3.4- Dihydro-6,7-dimethoxy-isoquinolin 9.10- Dimethoxy-2,3,6,7-tetrahydro-4//pyrimido isoquinoline-2,4-dione 9.10- Dimethoxy-2- -6,7-dihydro-4//-pyrimido isoquinolin-4-one 9.10- Dimethoxy-3,4,6,7-tetrahydro-2 pyrimido isoquinolin-2,4-dione Isoquinoline 3.4- dihydro-6,7-dimethoxy Isoquinoline, 1,2,3,4-tetrahydro-6,7-dimethoxy-1 -methyl Isoquinoline, 3,4-dihydro-6,7-dimethoxy-1-methyl