6'-Iodo-dihydropapaverine methiodide 74411-75-9 ISOQUINOLINIUM, 3,4-DIHYDRO-6,7-DIMETHOXY-1-((4,5-DIMETHOXY-2-IODOPHENYL)METHYL) Isoquinolinium, 3,4-dihydro-6,7-dimethoxy-1-((4,5-dimethoxy-2-iodophenyl)methyl)-2-methyl-, iodide