1-Piperidinebutanamide, 4-amino-N-(2-((1-(cyclohexylmethyl)-2,3-dihydroxy-5-(2-pyridinyl)pentyl)amino)-1-(1H-imidazol-4-ylmethyl)-2-oxoethyl)-gamma-oxo-alpha-(phenylmethyl)-, (1S-(1R*(R*(S*)),2S*,3R*))-, monoacetate (salt)