1 2SO 3-{3-[(3r)-3,4-dihydroxybutyl]-1-(8-phenyloctyl)-1h-imidazol-3-ium-5-yl}-L-alanine 1.000 2 56A 3-(8-phenyloctyl)-L-histidine 0.806 3 3ZH 11-{4-[(2s)-2-amino-2-carboxyethyl]-3-(8-phenyloctyl)-2,3-dihydro-1h-imidazol-1-yl}undecanoic acid 0.725