Using CCCCCCOC(=O)c1cccc(C(=O)c2ccc(C)cc2OCCCCCC)c1 to produce CCCCCCOc1cc(C)ccc1C(=O)c1cccc(C(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.