Synonyms: Butanedioicacid, methyloxo-, diethyl ester (9CI); Oxalacetic acid, methyl-, diethyl ester(6CI,7CI,8CI); 2-Methyl-3-(oxo)succinic acid diethyl ester; Diethyl2-methyl-3-oxo-1,4-butanedioate; Diethyl 2-methyl-3-oxosuccinate; Diethyl2-oxo-3-methylsuccinate; Diethyl 3-methyl-2-oxosuccinate; Diethylmethyloxalacetate; Diethyl oxalopropionate; Ethyl a-ethoxalylpropionate; NSC 33946