Bortezomib Isoamyl Impurity

Chemical Name: N-((R)-1-(((R)-3-methyl-1-((3aS,4S,6S,7aR)-3a,5,5-trimethylhexahydro-4,6-methanobenzo[d][1,3,2]dioxaborol-2-yl)butyl)amino)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxamide

Synonym: Aprepitant M2 Metabolite Enantiomer

Smile: C[C@]([C@@]1([H])C[C@]2([H])C3)(OB([C@H](CC(C)C)NC([C@H](NC(C4=NC=CN=C4)=O)CC5=CC=CC=C5)=O)O1)[C@]3([H])C2(C)C