73926-95-1 Butanedioic acid, 2-(diethoxymethyl)-3-formyl-, diethyl ester Diethyl 2,3-diformylsuccinate mono(diethylacetal) NSC221186 Succinic acid, 2,3-diformyl-, diethyl ester, mono(diethylacetal) WLN: 2OYO2&YVO2&YVHVO2