Synonyms: (1S,2S,5R)-Methyl 3-((S)-2-(tert-butoxycarbonylaMino)-3,3-diMethylbutanoyl)-6,6-diMethyl-3-azabicyclo[3.1.0]hexane-2-carboxylate;(1S,2S,5R)-Methyl 3-((S)-2-(3-(tert-butyl)ureido)-3,3-diMethylbutanoyl)-6,6-diMethyl-3-azabicyclo[3.1.0]hexane-2-carboxylate;3-Azabicyclo[3.1.0]hexane-2-carboxylic acid, 3-[(2S)-2-[[[(1,1-diMethylethyl)aMino]carbonyl]aMino]-3,3-diMethyl-1-ox obutyl]-6,6-diMethyl-, Methyl ester, (1R,2S,5S)-;(1R,2S,5S)-3-[(2S)-2-[[[(1,1-Dimethylethyl)amino]carbonyl]amino]-3,3-dimethyl-1-oxobutyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylic acid methyl ester