1,2,3,3-Tetramethyl-3,4-dihydroisoquinolinium iodide 120402-42-8 3,4-Dihydro-1,2,3,3-tetramethylisoquinolinium iodide Isoquinolinium, 3,4-dihydro-1,2,3,3-tetramethyl-, iodide Isoquinolinium, 3,4-dihydro-1,2,3,4-tetramethyl-, iodide