4-((6,7-Dihydroxyisoquinolin-1-yl)methyl)-2,3-dihydroxybenzenesulfonic acid
1-((2-Carbamothioylhydrazono)methyl)isoquinoline-5-sulfonic acid
5-Bromoisoquinoline-8-sulfonic acid
1-Chloroisoquinoline-5-sulfonic acid
2-(Isoquinolin-1-yl)-5-phenyl-4-sulfo-1H-pyrrole-3-carboxylic acid
8-Chloroisoquinoline-5-sulfonic acid
