Using Cn1cc(Br)cc(Nc2ccc(N3CCNCC3=O)cn2)c1=O, CC(=O)O[BH-](OC(C)=O)OC(C)=O to produce CN1CCN(c2ccc(Nc3cc(Br)cn(C)c3=O)nc2)C(=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.