Using CCOC(=O)CCBr, O=C1c2ccccc2S(=O)(=O)c2cc(-c3nnn[nH]3)ccc21 to produce O=C(O)CCn1nnnc1-c1ccc2c(c1)S(=O)(=O)c1ccccc1C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.