Using COC(=O)COc1ccc(CCC(=O)c2ccc(OC)c(CCC(C)C)c2O)cc1 to produce COc1ccc(C(=O)CCc2ccc(OCC(=O)O)cc2)c(O)c1CCC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.