Using SCc1ccccc1, CCOC(=O)Cc1ccc(OC)c(Oc2ccc(Cl)cc2CBr)c1 to produce CCOC(=O)Cc1ccc(OC)c(Oc2ccc(Cl)cc2CSCc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.