Using C[C@@H](c1ccccc1)N1CC[C@H](C2(N(C)C(=O)OC(C)(C)C)CC2)C1=O to produce C[C@@H](c1ccccc1)N1CC[C@@H](C2(N(C)C(=O)OC(C)(C)C)CC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.