Synonyms: alpha-Keto-3-(methyl-13C)-butyric-4-13C acid sodium; alpha-Ketoisovaleric acid-13C2 sodium salt; 2-Ketoisovaleric acid-13C2 sodium salt; 3-Methyl-13C-oxobutanoic-4-13C acid sodium salt; Sodium alpha-ketoisovalerate-3-(methyl-13C),4-13C Molecular Formula: 13C2C3H7NaO3 Molecular Weight:...