1 RHO Tetramethylrhodamine-5-maleimide 1.000 2 A1EI4 [9-(2-carboxyphenyl)-6-(dimethylamino)xanthen-3-ylidene]-dimethyl-azanium 0.806 3 F5M 5-(2,5-dioxo-2,5-dihydro-1h-pyrrol-1-yl)-2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)benzoic acid 0.789 4 323 2-[3,6-bis(dimethylamino)xanthen-9-yl]-5-methanoyl-benzoate 0.763 5 FH8 5-carboxy methylrhodamine 0.744 6 V8C 5-aminocarbonyl-2-[3-(dimethylamino)-6-dimethylazaniumylidene-xanthen-9-yl]benzoate 0.744 7 RHB N-[9-(2-carboxyphenyl)-6-(diethylamino)-3h-xanthen-3-ylidene]-N-ethylethanaminium 0.725 8 ROS N,N'-tetramethyl-rosamine 0.722