The molecule is a guanidinium ion that is the conjugate acid of apraclonidine, obtained by protonation of the guanidino group. Major microspecies at pH 7.3. It is a conjugate acid of an apraclonidine.
2,6-dichloro-1-N-(4,5-dihydro-1H-imidazol-3-ium-2-yl)benzene-1,4-diamine