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 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 .