Using COC(=O)[C@@H]1C[C@@H](Oc2nc3cc(C#N)ccc3c3cc(OC)c(Br)cc23)CN1C(=O)OC(C)(C)C to produce COC(=O)[C@@H]1C[C@@H](Oc2nc3cc(C#N)ccc3c3cc(OC)c(Br)cc23)CN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.