The molecule is an alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino and guanidino groups of (3S)-3-hydroxy-L-arginine It is a conjugate acid of a (3S)-3-hydroxy-L-arginine.
(2S,3S)-2-azaniumyl-5-(diaminomethylideneazaniumyl)-3-hydroxypentanoate