The molecule is an L-alpha-amino acid that is L-alanine in which one of the methyl hydrogens is substituted by a 2-iminoimidazolidin-4-yl group. It is a member of imidazolidines, a L-histidine derivative and a non-proteinogenic L-alpha-amino acid. It is a conjugate base of a L-enduracididine(1+).
(2S)-2-amino-3-[(4R)-2-amino-4,5-dihydro-1H-imidazol-4-yl]propanoic acid