IUPAC:1-{2',4',5',7'-tetrabromo-3',6'-dihydroxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthen]-5-yl}-2,5-dihydro-1H-pyrrole-2,5-dione
IUPAC:1-{2',4',5',7'-tetrabromo-3',6'-dihydroxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthen]-5-yl}-2,5-dihydro-1H-pyrrole-2,5-dione