Polaprezinc107667-60-7100 % similar Carnosine305-84-046 % similar D-Histidine351-50-842 % similar Dl-histidine4998-57-642 % similar Histidine71-00-142 % similar D-Histidine hydrochloride6341-24-839 % similar DL-Histidine hydrochloride6459-59-239 % similar Histamine51-45-638 % similar Dl-histidine monohydrochloride monohydrate123333-71-137 % similar L-Histidine hydrochloride monohydrate5934-29-237 % similar Prezatide copper acetate130120-57-937 % similar Histamine dihydrochloride56-92-835 % similar Copper peptide ghk-cu49557-75-735 % similar Histidine methyl ester dihydrochloride7389-87-935 % similar N-Acetyl-L-histidine2497-02-134 % similar Histamine diphosphate51-74-134 % similar Histidylglycine2578-58-734 % similar N-Benzoyl-L-histidine5354-94-933 % similar (2S)-2-Amino-3-(1H-imidazol-4-yl)propanamide dihydrochloride71666-95-032 % similar 1H-Imidazole-5-acetic acid645-65-832 % similar