N-[2-(1H-imidazol-4-yl)ethyl]-L-glutamine residue
n-[2-(1h-imidazol-4-yl)ethyl]-l-glutamine residue
An <small>L</small>-α-amino acid residue residue derived from <em>N</em><small><sup>α</small></sup>-γ-<small>L</small>-glutamylhistamine