Using [I-], CS(=O)(=O)OCC1CCc2cc(Br)cc3[nH]c(=O)c(=O)n1c23 to produce O=c1[nH]c2cc(Br)cc3c2n(c1=O)C(CI)CC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.