Using BrCc1nc2cc(Br)ccc2s1, CCOC(=O)Cc1n[nH]c(=O)c2ccccc12 to produce CCOC(=O)Cc1nn(Cc2nc3cc(Br)ccc3s2)c(=O)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.