Dihydro-2,5-furandione; 2,5-Diketotetrahydrofuran; Butanedioic Anhydride; Rikacid SA; Succinic Acid Anhydride;Succinyl Anhydride; Succinyl Oxide; Tetrahydro-2,5-dioxofuran; Tetrahydro-2,5-furandione