2',7',-Dibromo-3',6'-dihydroxyspiro (isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 2',7'-dibromo-3',6'-dihydroxyspiro(isobenzofuran-1(3H),9'-[9H]xanthene)-3-one, 2,7-Dibromfluorescein, 2',7'-Dibrom-3',6'-dihydroxy-spiro[phthalan-1,9'-xanthen]-3-on, 2',7'-Dibrom-fluorescein, 2'7-DIBROMO-3'6'-DIHYDROXYSPIRO (ISOBENZOFURAN-1(3H),9'-(9H)XANTHEN)-3-ONE, 2'7-DIBROMO-3'6'-DIHYDROXYSPIRO(ISOBENZOFURAN-1(3H),9'-(9H)XANTHEN)-3-ONE