Using BrCc1cccc(Br)c1, O=C(O)c1cc(I)c(O)c(I)c1 to produce O=C(OCc1cccc(Br)c1)c1cc(I)c(OCc2cccc(Br)c2)c(I)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.