1 ORE 4-(2,7-difluoro-6-hydroxy-3-oxo-3h-xanthen-9-yl)isophthalic acid 1.000 2 FDS Fluorescin 0.833 3 FLU 2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)-benzoic acid 0.833 4 A4F 5-amino-2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)benzoic acid 0.806 5 F3U 4-methanoyl-2-(6-oxidanyl-3-oxidanylidene-4~{H}-xanthen-9-yl)benzoic acid 0.781 6 6B9 2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)-5-[(E)-(sulfanylmethylidene)amino]benzoic acid 0.758 7 F6Z 3',6'-dihydroxy-3-oxo-3h-spiro[2-benzofuran-1,9'-xanthene]-5-carboxylic acid 0.758 8 52M 2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)-5-[(sulfanylcarbonyl)amino]benzoic acid 0.735 9 9ZZ Erythrosin 0.735 10 FH8 5-carboxy methylrhodamine 0.722