Using CC(C)(C)OC(=O)N1CCN(CCCCN2C(=O)CCC(=O)c3ccccc32)CC1 to produce O=C1CCC(=O)N(CCCCN2CCNCC2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.