Using CCOC(=O)CBr, S=c1[nH]c(-c2ccccc2)c(-c2ccccc2)o1 to produce CCOC(=O)CSc1nc(-c2ccccc2)c(-c2ccccc2)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.