1,1,1-Trimethyl-N-((S)-3-methyl-1-((3aS,4S,6S,7aR)-3a,5,5-trimethylhexahydro-4,6-methanobenzo[d][1,3,2]dioxaborol-2-yl)butyl)-N-(trimethylsilyl)silanamine,1,1,1-Trimethyl-N-((S)-3-methyl-1-((3aS,4S,6S,7aR)-3a,5,5-trimethylhexahydro-4,6-methanobenzo[d][1,3,2]dioxaborol-2-yl)butyl)-N-(trimethylsilyl)silanamine,Bortezomib