Using CI, COc1cccc(NCC(O)Cn2c3ccc(Br)cc3c3cc(Br)ccc32)c1 to produce COc1cccc(NCC(Cn2c3ccc(Br)cc3c3cc(Br)ccc32)OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.