D & C Red no. 21; 2',4',5',7'-Tetrabromo-3',6'-dihydroxyspiro(isobenzofuran-1(3H),9- '-(9H)xanthen)-3-one; 2',4',5',7'-Tetrabromofluorescein; Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 2',4',5',7'-tetrabromo-3',6'-dihydroxy-; 3,6-Dihydroxy-2,4,5,7-tetrabromospiro(xanthene-9,3'-phthalide); 4-19-00-02917 (Beilstein Handbook Reference); Bromeosin; Bromoeosin; C.I. Solvent Red 43; D and C Red No. 21; Eosin Y spirit soluble; Eosin acid; Eosine acid; Fluorescein, 2',4',5',7'-tetrabromo- (VAN); Japan Red 223; Japan Red No. 223; Red No. 223; Solvent Red 43; Spiro(isobenzofuran-1(3H),9'-(9H)-xanthen)-3-one, 2',4',5',7'-tetrabromo-3',6'-dihydroxy-; Fluorescein, 2',4',5',7'-tetrabromo-; C.I. 45380:2; disodium 2-(2,4,5,7-tetrabromo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate; 2',4',5',7'-tetrabromo-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one; Eosin Yellowish; 2-(2,4,5,7-tetrabromo-6-hydroxy-3-oxo-3H-xanthen-9-yl)benzoic acid