Using CCCCCCI, CCCc1c(OCCCCCCc2cccc(O)c2O)ccc(C(=O)O)c1O to produce CCCCCCOC(=O)c1ccc(OCCCCCCc2cccc(O)c2O)c(CCC)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.