Using COc1ccc2c(c1)nc(S)n2Cc1csc2ccccc12, CCOC(=O)CCCBr to produce CCOC(=O)CCCSc1nc2cc(OC)ccc2n1Cc1csc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.