Using CCCc1c(OCCCSc2ccc(CC(=O)OC)cc2Cl)ccc2cc(CC)c(=O)oc12 to produce CCCc1c(OCCCSc2ccc(CC(=O)O)cc2Cl)ccc2cc(CC)c(=O)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.