57553-29-4 6,7-Dihydroxy-2,2-dimethyl-1,2,3,4-tetrahydroisoquinolinium iodide 6,7-Dihydroxy-2-methyl-1,2,3,4-tetrahydroisoquinoline methiodide ISOQUINOLINIUM, 1,2,3,4-TETRAHYDRO-6,7-DIHYDROXY-2,2-DIMETHYL-, IODIDE