(E)-but-2-enedioate but-2-enedioate 142-42-7 (E)-Butenedioic acid CHEBI:36180 fumarate butenedioate (E)-1,2-Ethylenedicarboxylic acid Butenedioic acid (E)-2-butenedioic acid, ion(2-) CHEBI:29806 (2E)-but-2-enedioate InChI=1/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/p-2/b2-1 2-Butenedioic acid (E)-, ion(2-) fumarate(2-) Fumaric acid, ion(2-) trans-1,2-Ethenedicarboxylic acid trans-Butenedioic acid ZINC03860193 c0111 trans-1,2-Ethylenediccarboxylic acid Fumarate dianion