Using C=C1CCN(C(=O)OC(C)(C)C)CC(=O)N(Cc2ccccc2)c2ccccc21 to produce CC1CCN(C(=O)OC(C)(C)C)CC(=O)N(Cc2ccccc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.