Synonyms: alpha-Keto-3-(methyl-d3)-butyric acid-4-13C,3-d sodium; alpha-Ketoisovaleric acid-13C,d4 sodium salt; 2-Ketoisovaleric-3(methyl-d3),4-13C,3-d acid sodium salt; 3-Methyl-2-oxobutanoic acid-13C,d4 sodium salt; Sodium alpha-ketoisovalerate-3-(methyl-d3),4-13C,3-d sodium salt Molecular...