Using Cc1nc2c(OCc3c(Cl)ccc(N)c3Cl)cccn2c1Br, CC(C)=O to produce Cc1nc2c(OCc3c(Cl)ccc(NC(C)C)c3Cl)cccn2c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.