100111-03-3 3',6'-Dihydroxy-4',5'-dimethyl-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthene)-6-carboxylic acid 4',5'-Dimethyl-6-carboxyfluorescein 6-Carboxy-4',5'-dimethylfluorescein 6-Carboxydimethylfluorescein Cdmfda Me2CFA2 Spiro(isobenzofuran-1(3H),9'-(9H)xanthene)-6-carboxylic acid, 3',6'-dihydroxy-4',5'-dimethyl-3-oxo-