Using CC=O, Cn1cc(Br)cc(Nc2ccc(C3CNC3)cn2)c1=O to produce CCN1CC(c2ccc(Nc3cc(Br)cn(C)c3=O)nc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.