Using Cn1c(-c2ccccn2)nc(-c2ccc(Br)cc2)c1Sc1ccc(Cl)cc1, II to produce Cn1c(-c2ccccn2)nc(-c2ccc(I)cc2)c1Sc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.