The molecule is an alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino and guanidino groups of L-enduracididine. It is a conjugate acid of a L-enduracididine.
(2S)-3-[(5R)-2-amino-4,5-dihydro-1H-imidazol-3-ium-5-yl]-2-azaniumylpropanoate