Synonyms
1H,5H,11H,15H-Xantheno(2,3,4-ij:5,6,7-i'j')diquinolizin-18-ium, 9-(2,4-disulfophenyl)-2,3,6,7,12,13,16,17-octahydro-, inner salt; Hydrogen 9-(2,4-disulphonatophenyl)-2,3,6,7,12,13,16,17-octahydro-1H,5H,11H,15H-xantheno(2,3,4-ij:5,6,7-i'j')diquinolizin-18-ium; [ChemIDplus]