Using O=Cc1cccc2ccccc12, COC(=O)C1CN(C(=O)OC(C)(C)C)CCN1 to produce COC(=O)C1CN(C(=O)OC(C)(C)C)CCN1Cc1cccc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.