2-Ketosuccinic acid 2-Oxobutanedioic acid 2-Oxosuccinic acid 328-42-7 Butanedioic acid, oxo- Butanedioic acid, oxo- (9CI) Ketosuccinic acid OAA Oxalacetic acid Oxalacetic acid (8CI) Oxaloacetic acid Oxaloethanoic acid Oxobutanedioic acid Oxosuccinic acid alpha-Ketosuccinic acid oxalacetate oxaloacetate