9-(2,4-Disulfophenyl)-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 inner salt
2-((3H-Phenothiazin-3-ylidene)amino)benzene-1,4-disulfonic acid
2-(4-(4-Nitro-2-sulfostyryl)-3-sulfophenyl)-2H-naphtho[1,2-d][1,2,3]triazole-5-sulfonic acid
2-(4-Nitrophenyl)-2H-naphtho[1,2-d][1,2,3]triazole-6,8-disulfonic acid
5-Thioxo-1,5-dihydro-[1,2,4]triazolo[4,3-a]pyrimidine-7-sulfonic acid
3-(4-Hydroxyphenyl)-4-oxo-4H-chromen-7-yl hydrogen sulfate
Tetraoxo-2H-dibenzo(d,d')benzo(1,2-b,5,4-b')dithiophene-3,9-disulfonic acid
1H-Benzo[d][1,2,3]triazole-4-sulfonic acid
8-Hydroxy-3-methylbenzo[f]quinoline-5-sulfonic acid
5,7-Dihydroxy-4-oxo-2-phenyl-4H-chromen-6-yl hydrogen sulfate
9-Ethyl-3-(2-(1,3,3-trimethylindolin-2-ylidene)ethylidene)-3H-carbazol-9-ium hydrogensulfate
2,9-Dimethyl-4,7-diphenyl-1,10-phenanthrolinedisulfonic acid disodium salt
4-Oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidine-5-sulfonic acid
((2R,3R,4S,5R,6S)-3,4,5-Trihydroxy-6-((4-methyl-2-oxo-2H-chromen-7-yl)oxy)tetrahydro-2H-pyran-2-yl)methyl hydrogen sulfate
5-(2H-Naphtho[1,2-d][1,2,3]triazol-2-yl)-2-styrylbenzenesulfonic acid
2,2'-(1,10-Phenanthroline-4,7-diyl)dibenzenesulfonic acid
Dibenzo[b,d]furan-4-sulfonic acid
Dibenzo[b,d]furan-1-sulfonic acid
2-((7-Nitrobenzo[c][1,2,5]oxadiazol-4-yl)amino)ethanesulfonic acid
7-Fluorobenzo[c][1,2,5]oxadiazole-4-sulfonic acid
