(2S,3R)-tert-butyl 3-(tert-butoxy)-2-(3-((S)-1-(3-((R)-2-(tert-butoxy)-1-((tert-butoxycarbonyl)amino)ethyl)-1,2,4-oxadiazol-5-yl)-3-oxo-3-(tritylamino)propyl)ureido)butanoate 500mg

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