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Imidazolyl-4-ethanol872-82-2100 % similar 1H-Imidazole-5-methanol822-55-962 % similar Histamine51-45-657 % similar 4-(Hydroxymethyl)imidazole hydrochloride32673-41-955 % similar Histamine dihydrochloride56-92-852 % similar Histamine diphosphate51-74-147 % similar 1H-Imidazole-5-acetic acid645-65-845 % similar 4(5)-Cyanomethylimidazole18502-05-145 % similar L-Histidinol dihydrochloride1596-64-143 % similar D(+)-Histidinol dihydrochloride75614-84-543 % similar Imidazoleacetic acid hydrochloride3251-69-242 % similar D-Histidine351-50-839 % similar DL-Histidine4998-57-639 % similar Histidine71-00-139 % similar 2,5-Pyrazinediethanol4744-51-839 % similar 4-Pyridineethanol5344-27-438 % similar L-Histidine hydrochloride (1:?)1007-42-737 % similar D-Histidine hydrochloride6341-24-837 % similar L-Histidine monohydrochloride645-35-237 % similar DL-Histidine hydrochloride6459-59-237 % similar