1,2-Bis(methoxycarbonyl)acetylene 2-Butynedioic acid, dimethyl ester 762-42-5 Acetylenedicarboxylic acid dimethyl ester Acetylenedicarboxylic acid, dimethyl ester Bis(methoxycarbonyl)acetylene Dimethyl 2-butynedioate Dimethyl acetylenedicarboxylate Dimethyl butynedioate Methyl acetylenedicarboxylate NSC14912 WLN: 1OV1UU1VO1