Using CC(C)(C)OC(=O)CN1C(=O)CN(C(=O)OCc2ccccc2)CCCc2ccccc21 to produce CC(C)(C)OC(=O)CN1C(=O)CNCCCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.