Using COC(=O)c1ccc(OCCCCCCc2cccc(OC)c2OC)cc1O to produce COc1cccc(CCCCCCOc2ccc(C(=O)O)c(O)c2)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.