1 FH8 5-carboxy methylrhodamine 1.000 2 323 2-[3,6-bis(dimethylamino)xanthen-9-yl]-5-methanoyl-benzoate 0.969 3 V8C 5-aminocarbonyl-2-[3-(dimethylamino)-6-dimethylazaniumylidene-xanthen-9-yl]benzoate 0.939 4 A1EI4 [9-(2-carboxyphenyl)-6-(dimethylamino)xanthen-3-ylidene]-dimethyl-azanium 0.906 5 ROS N,N'-tetramethyl-rosamine 0.812 6 RHB N-[9-(2-carboxyphenyl)-6-(diethylamino)-3h-xanthen-3-ylidene]-N-ethylethanaminium 0.806 7 RHO Tetramethylrhodamine-5-maleimide 0.744 8 ORE 4-(2,7-difluoro-6-hydroxy-3-oxo-3h-xanthen-9-yl)isophthalic acid 0.722