Compound 23
From the following article
Proteomic profiling of metalloprotease activities with cocktails of active-site probes
Stephan A Sieber, Sherry Niessen, Heather S Hoover & Benjamin F Cravatt
Nature Chemical Biology 2, 274-281 (2006) Published online: 26 March 2006
doi:10.1038/nchembio781

Compound 23
(2R,3S)-N1-((S)-1-((S)-1-((S)-1-amino-6-hex-5-ynamido-1-oxohexan-2-ylamino)-3-(4-benzoylphenyl)-1-oxopropan-2-ylamino)-1-oxopropan-2-yl)-N4,3-dihydroxy-2-isobutylsuccinamide
