Using CCC1(CCC(C)=O)C(=O)c2c(cc(OCC(=O)OC)c(Cl)c2Cl)C1C to produce CCC12CCC(=O)C=C1c1c(cc(OCC(=O)O)c(Cl)c1Cl)C2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.