Using C[C@@H](COC1CCN(c2nc3ccc(O)cc3o2)CC1)NC(=O)OC(C)(C)C, BrC1CCC1 to produce C[C@@H](COC1CCN(c2nc3ccc(OC4CCC4)cc3o2)CC1)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.