Using O=C1CCN(C(=O)OCc2ccccc2)CC1, CCCCCC(=O)O to produce CCCCC(C(=O)O)C1(O)CCN(C(=O)OCc2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.