N-((S)-1-Oxo-3-phenyl-1-(((R)-1-((3aS,4S,6S,7aR)-3a,5,5-trimethylhexahydro-4,6-methanobenzo[d][1,3,2]dioxaborol-2-yl)pentyl)amino)propan-2-yl)pyrazine-2-carboxamide

(1R)-(1S,2S,3R,5S)-Pinanediol-N-(N-pyrazinylphenylalaninoyl)-1-aminopentyl-1-boronate is an intermediate in the preparatin of Bortezomib (B675700), a dipeptidyl boronate proteasome inhibitor.