.alpha.-Ketoglutaric acid .alpha.-Oxoglutaric acid 2-Ketoglutaric acid 2-Oxo-1,5-pentanedioic acid 2-Oxoglutaric acid 2-Oxopentanedioic acid 328-50-7 Alphaketoglutaric acid GLUTARIC ACID, ALPHA KETO Glutaric acid, 2-oxo- NSC17391 Pentanedioic acid, 2-oxo-