Using OCCCCCl, CC(Oc1ccc(Oc2ccc(Cl)cc2)cc1)C(=O)O to produce CC(Oc1ccc(Oc2ccc(Cl)cc2)cc1)C(=O)OCCCCCl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.