Using O=C1c2c(Br)cccc2-n2cncc2[C@@H]2CCCN12, II to produce O=C1c2c(Br)cccc2-n2cnc(I)c2[C@@H]2CCCN12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.