SEARCH Articles Figures Tables 6.7- Dimethoxy-3,4-dihydro 6.7- Dimethoxy-4 isoquinoline 9.10- Dimethoxy-2- -6,7-dihydro-4//-pyrimido isoquinolin-4-one Isoquinoline 3.4- dihydro-6,7-dimethoxy Isoquinoline 3.4- dihydro-6,7-dimethoxy Isoquinoline, 3,4-dihydro-6,7-dimethoxy-1-methyl