3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-4',5'-dicarbaldehyde

3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-4',5'-dicarbaldehyde · CAS 357615-03-3