Using CCC1(c2ccccc2)C(=O)N(CCCCC(=O)OC)C(=O)N=C1O to produce CCC1(c2ccccc2)C(=O)N(CCCCC(=O)O)C(=O)N=C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.