The molecule is a D-alpha-amino acid zwitterion resulting from a transfer of a proton from the carboxy group to the amino group of D-alloisoleucine; major species at pH 7.3. It is an enantiomer of a L-alloisoleucine zwitterion. It is a tautomer of a D-alloisoleucine.
(2R,3S)-2-azaniumyl-3-methylpentanoate