Using COC(=O)CC(=O)C(C)Br, NC(=S)c1ccc(-c2ccccc2)nc1 to produce COC(=O)Cc1nc(-c2ccc(-c3ccccc3)nc2)sc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.