5(6)-Carboxynaphthofluorescein diacetate

3,11-bis(Acetyloxy)carboxynaphthofluorescein is an intermediate in the synthesis of 5-(6)-Carboxynaphthofluoroscein N-Succinimidyl Ester (C179025), a derivative compound of 5(6)-Carboxyfluorescein (C178315), which functions as a useful reagent for the preparation of hydrolytically stable fluorescent conjugates and is a useful starting material for the synthesis of other fluorescein-derives reagent.