123-56-8 127004-69-7 2,5-Diketopyrrolidine 2,5-Dioxopyrrolidine 2,5-Pyrrolidinedione 3,4-Dihydropyrrole-2,5-dione 3,4-Dihydropyrrolidine 37912-62-2 5-21-09-00438 (Beilstein Handbook Reference) 52523-57-6 55047-82-0 584-43-0 67893-50-9 68527-59-3 89963-74-6 AI3-08539 BRN 0108440 Butanimide Dihydro-3-pyrroline-2,5-dione EINECS 204-635-6 NSC 11204 SUCCINIMIDE Succinic acid imide Succinic imide Succinimide-sauba