The molecule is an L-ornithine substituted at position 3 by a hydroxy group (the 3S-erythro-stereoisomer). It is a L-ornithine derivative and a non-proteinogenic alpha-amino acid. It is a conjugate base of a (3S)-3-hydroxy-L-ornithine(1+).
(2S,3S)-2,5-diamino-3-hydroxypentanoic acid