Solvent red 19752372-39-1100 % similar 3-(Diethylamino)-7-oxo-7H-[1]benzopyrano[3′,2′:3,4]pyrido[1,2-A]benzimidazole-6-carbonitrile52372-36-878 % similar Coumarin 727425-55-440 % similar Coumarin 638215-36-039 % similar Nile red7385-67-334 % similar Macrolex yellow94945-27-434 % similar Methylene violet 3rax4569-86-232 % similar