Using CCc1nc2c(Cl)ccc(OCC(=O)OC)c2c(OC(F)F)c1Cc1ccc(Cl)cc1F to produce CCc1nc2c(Cl)ccc(OCC(=O)O)c2c(OC(F)F)c1Cc1ccc(Cl)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.