Using Sc1nc(-c2ccccc2)c(-c2ccccc2)[nH]1, CCOC(=O)CCCCBr to produce CCOC(=O)CCCCSc1nc(-c2ccccc2)c(-c2ccccc2)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.