3,4-dicarbethoxy-2,5-hexanedion, v1&AC1L3U89, 2,3-diacetyl-Butanedioicacid 1,4-diethylester, Butanedioic acid,2,3-diacetyl-,diethyl ester, ethyl 2,3-diacetyl-butanoate, 2ovyv1&Diethyl 2,3-diacetylsuccinate, vo2, diethyl-2,3-acetylsuccinate, Butanedioic acid, 2,3-diacetyl-, diethyl ester, 2,3-diacetylbutanoic acid diethyl ester