Using [I-], Cc1cc(N2CCC(CCOS(C)(=O)=O)CC2)c2c(C)cn(-c3c(C)cc(Br)cc3C)c2n1 to produce Cc1cc(N2CCC(CCI)CC2)c2c(C)cn(-c3c(C)cc(Br)cc3C)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.