Using COC(=O)c1cc(S(=O)(=O)c2cc(Br)c3nc[nH]c3c2)c(SC)s1, O=C([O-])[O-] to produce COC(=O)c1cc(S(=O)(=O)c2cc(Br)c3ncn(C)c3c2)c(SC)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.