4,4′-{1,2-Ethanediylbis[(3,6-dioxo-1,4-cyclohexadiene-4,1-diyl)methyleneoxy]}bis(4-oxobutanoic acid)

4,4′-{1,2-Ethandiylbis[(3,6-dioxo-1,4-cyclohexadien-4,1-diyl)methylenoxy]}bis(4-oxobutansäure)

4,4′-{1,2-Ethanediylbis[(3,6-dioxo-1,4-cyclohexadiene-4,1-diyl)methyleneoxy]}bis(4-oxobutanoic acid)

Acide 4,4′-{1,2-éthanediylbis[(3,6-dioxo-1,4-cyclohexadiène-4,1-diyl)méthylèneoxy]}bis(4-oxobutanoïque)

Butanedioic acid, 1,1′-[1,2-ethanediylbis[(3,6-dioxo-1,4-cyclohexadiene-4,1-diyl)methylene]] ester

Succinic acid mono-(4-{2-[4-(3-carboxy-propionyloxymethyl)-3,6-dioxo-cyclohexa-1,4-dienyl]-ethyl}-3,6-dioxo-cyclohexa-1,4-dienylmethyl) ester