D-Histidine hydrochloride6341-24-831 % similar L-Histidine monohydrochloride645-35-231 % similar DL-Histidine hydrochloride6459-59-231 % similar Semax80714-61-031 % similar L-Tryptophyl-L-proline38136-75-330 % similar Levetiracetam102767-28-230 % similar Alpha-ethyl-2-oxo-1-Pyrrolidineacetamide33996-58-630 % similar Alacepril74258-86-930 % similar Dl-histidine monohydrochloride monohydrate123333-71-130 % similar Histidine monohydrochloride monohydrate5934-29-230 % similar