2103-64-2 4,5-Dihydroxyfluorescein C.I. 45445 C.I. Mordant Violet 25 Fluoran, 3',4',5',6'-tetrahydroxy- Fluorescein, 4',5'-dihydroxy- Gallein NSC8668 Pyrogallolphthalein Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 3',4',5',6'-tetrahydroxy-