Using Cc1c(Cl)cncc1Cl, COC(=O)c1ccc(OC)c2c1OCC1(COCOC1)CO2 to produce COc1ccc(C(=O)Cc2c(Cl)cncc2Cl)c2c1OCC1(COCOC1)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.