Synonyms: 1,2,3,4-Tetrahydro-7-hydroxy-1-(p-hydroxybenzyl)-6-methoxy-2,2-dimethylisoquinolinium iodide(7CI); Isoquinolinium,1,2,3,4-tetrahydro-7-hydroxy-1-(p-hydroxybenzyl)-6-methoxy-2,2-dimethyl-,iodide (8CI); Isoquinolinium,1,2,3,4-tetrahydro-7-hydroxy-1-[(4-hydroxyphenyl)methyl]-6-methoxy-2,2-dimethyl-,iodide (9CI)