IUPAC:2,5-dioxopyrrolidin-1-yl 4',5'-dichloro-3',6'-dihydroxy-2',7'-dimethoxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthene]-6-carboxylate
IUPAC:2,5-dioxopyrrolidin-1-yl 4',5'-dichloro-3',6'-dihydroxy-2',7'-dimethoxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthene]-6-carboxylate