Bortezomib Impurity 48

Chemical Name: N,N',N''-((2R,2'R,2''R)-(((1S,1'S,1''S)-(1,3,5,2,4,6-trioxatriborinane-2,4,6-triyl)tris(3-methylbutane-1,1-diyl))tris(azanediyl))tris(1-oxo-3-phenylpropane-1,2-diyl))tris(pyrazine-2-carboxamide)

Smile: O=C(N[C@H](CC1=CC=CC=C1)C(N[C@H](CC(C)C)B2OB([C@@H](CC(C)C)NC([C@@H](CC3=CC=CC=C3)NC(C4=NC=CN=C4)=O)=O)OB([C@@H](CC(C)C)NC([C@@H](CC5=CC=CC=C5)NC(C6=NC=CN=C6)=O)=O)O2)=O)C7=NC=CN=C7