Using CCO[C@@H]1Cc2cc(Br)ccc2[C@H]1N1CCN(C2(C)CCN(C(=O)OC(C)(C)C)CC2)C[C@@H]1C to produce CCO[C@@H]1Cc2cc(Br)ccc2[C@H]1N1CCN(C2(C)CCNCC2)C[C@@H]1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.