Using CCOC(=O)CCc1ccc(OCc2c(Cl)nsc2-c2ccccc2)c(C)c1C to produce Cc1c(CCC(=O)O)ccc(OCc2c(Cl)nsc2-c2ccccc2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.