Using Brc1ccccc1I, Cc1cc(C)cc(P(Cl)c2cc(C)cc(C)c2)c1 to produce Cc1cc(C)cc(P(c2cc(C)cc(C)c2)c2ccccc2Br)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.