Tetraethyl 2,2',2'',2'''-(((3',6'-dihydroxy-3-oxo-3h-spiro[isobenzofuran-1,9'-xanthene]-4',5'-diyl)bis(methylene))bis(azanetriyl))tetraacetate

Tetraethyl 2,2',2'',2'''-(((3',6'-dihydroxy-3-oxo-3h-spiro[isobenzofuran-1,9'-xanthene]-4',5'-diyl)bis(methylene))bis(azanetriyl))tetraacetate