oxalosuccinic acid oxalosuccinic acid oxalosuccinic acid is a substrate of the citric acid cycle. it is acted upon by isocitrate dehydrogenase. salts and esters of oxalosuccinic acid are known as oxalosuccinates. oxalosuccinic acid names preferred iupac name 1-oxopropane-1,2,3-tricarboxylic acid identifiers cas number 1948-82-9 y 3d model (jsmol) interactive image chebi chebi:7815 n chemspider 947 n echa infocard 100.230.021 kegg c05379 n pubchem cid 972 unii dfk99pw32k y inchi inchi=1s/c6h6o7/c7-3(8)1-2(5(10)11)4(9)6(12)13/h2h,1h2,(h,7,8)(h,10,11)(h,12,13) nkey: ufscuaxltrfidc-uhfffaoysa-n ninchi=1/c6h6o7/c7-3(8)1-2(5(10)11)4(9)6(12)13/h2h,1h2,(h,7,8)(h,10,11)(h,12,13)key: ufscuaxltrfidc-uhfffaoyak smiles c(c(c(=o)c(=o)o)c(=o)o)c(=o)o properties chemical formula c6h6o7 molar mass 190.108 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references oxalosuccinic acid/oxalosuccinate is an unstable 6-carbon intermediate in the tricarboxylic acid cycle. it's a keto acid, formed during the oxidative decarboxylation of isocitrate to alpha-ketoglutarate, which is catalyzed by the enzyme isocitrate dehydrogenase. isocitrate is first oxidized by coenzyme nad+ to form oxalosuccinic acid/oxalosuccinate. oxalosuccinic acid is both an alpha-keto and a beta-keto acid (an unstable compound) and it is the beta-ketoic property that allows the loss of carbon dioxide in the enzymatic reaction in conversion to the five-carbon molecule 2-oxoglutarate.