The molecule is an amino acid zwitterion resulting from a transfer of a proton from the carboxy to the amino group of (4S)-4-hydroxy-L-isoleucine; major species at pH 7.3. It has a role as a plant metabolite. It is a tautomer of a (4S)-4-hydroxy-L-isoleucine.
(2S,3R,4S)-2-azaniumyl-4-hydroxy-3-methylpentanoate