(2S-(2R*(R*(R*))))-N-(2-(4-(Aminocarbonyl)-3-thiazolidinyl)-1-(1H-imidazol-4-ylmethyl)-2-oxo ethyl)-6-oxo-2-piperidinecarboxamide 64784-01-6 MK 771 MK-771 Pyro(l-alpha-aminoadipyl)-L-histidyl-L-thiazolidine-4-carboxamide Pyro-2-aminoadipylhistidylthiazolidine-4-carboxyamide Pyro-aad-his-tzl-NH2