141-05-9 2-Butenedioic acid (2Z)-, diethyl ester 2-Butenedioic acid (Z)-, diethyl ester 2-Butenedioic acid (Z)-, diethyl ester (9CI) 2-Butenedioic acid, diethyl ester, (Z)- 4-02-00-02207 (Beilstein Handbook Reference) AI3-00678 BRN 1100825 CCRIS 941 Diethyl maleate Diethylester kyseliny maleinove [Czech] EINECS 205-451-9 Ethyl maleate Maleic acid, diethyl ester NSC 8394