1 52M 2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)-5-[(sulfanylcarbonyl)amino]benzoic acid 1.000 2 6B9 2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)-5-[(E)-(sulfanylmethylidene)amino]benzoic acid 0.966 3 FLG Fluoresceinylthioureido 0.875 4 FDS Fluorescin 0.862 5 FLU 2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)-benzoic acid 0.862 6 A4F 5-amino-2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)benzoic acid 0.833 7 F3U 4-methanoyl-2-(6-oxidanyl-3-oxidanylidene-4~{H}-xanthen-9-yl)benzoic acid 0.806 8 4CI N-[3',6'-bis(oxidanyl)-3-oxidanylidene-spiro[2-benzofuran-1,9'-xanthene]-5-yl]methanethioamide 0.781 9 9ZZ Erythrosin 0.758 10 2N2 2-(3,6-dihydroxy-9h-xanthen-9-yl)-5-{[(6-oxohexyl)carbamothioyl]amino}benzoic acid 0.757 11 CYF 5-[2-(2-amino-2-carbamoyl-ethylsulfanyl)-acetylamino]-2-(3,6-dihydroxy-9,9a-dihydro-3h-xanthen-9-yl)-benzoic acid 0.757 12 QRE 2-[3,6-bis(oxidanyl)-9~{H}-xanthen-9-yl]-5-[(6-oxidanyl-6-oxidanylidene-hexyl)carbamothioylamino]benzoic acid 0.737 13 ORE 4-(2,7-difluoro-6-hydroxy-3-oxo-3h-xanthen-9-yl)isophthalic acid 0.735