Using CCCCCCCCCCCCBr, O=c1c2ccccc2sc2c(O)ccc(Cl)c12 to produce CCCCCCCCCCCCOc1ccc(Cl)c2c(=O)c3ccccc3sc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.