The molecule is an L-arginine derivative in which the delta-nitrogen atoms carries a hydroxy group, one of the omega-nitrogen atoms carries a hydroxy group and the other omega-nitrogen atoms carries a methyl group; major species at pH 7.3. It is an amino acid zwitterion and a non-proteinogenic L-alpha-amino acid. It derives from a L-arginine derivative.
(2S)-2-azaniumyl-5-[hydroxy-(N-hydroxy-N'-methylcarbamimidoyl)amino]pentanoate