Butanoic acid,2-oxo-,sodium salt, sodium 2-ketobutyric acid, SodiuM 2-Oxobutyrate, 2-Oxobutanoic acid sodium salt, BUTYRIC ACID,2-OXO-,SODIUM SALT, 2-oxobuttersaeure,natrium salz, Sodium 2-Ketobutyrate, 2-Oxobutyric Acid Sodium Salt, 2-Ketobutyric Acid Sodium Salt, Sodium 2-oxobutanoate, 2-oxobutyric acid,sodium salt, Alpha-Ketobutyric Acid Sodium Salt