(Z)-2-BUTENEDIOIC ACID 1,2-Ethylenedicarboxylic acid, (Z) 110-16-7 2-Butenedioic acid (Z)- 2-Butenedioic acid, (Z)- Butenedioic acid, (Z)- Maleic acid NSC25940 Toxilic acid WLN: QV1U1VQ-C cis-1,2-Ethylenedicarboxylic acid cis-Butenedioic acid