calcium bis(3-[[(2R)-2,4-dihydroxy-3,3-dimethylbutanoyl]amino]propanoate); N-[(2R)-2,4-Dihydroxy-3,3-dimethyl-1-oxobutyl]-β-alanine Hemicalcium: Pantothenate-IMP-B- (2R)-2,4-dihydroxy-3,3-dimethylbutanoic acid