Using Cc1c(Br)cccc1Br, c1ccc(P(c2ccccc2)c2ccccc2)cc1 to produce Brc1cccc(Br)c1C[P+](c1ccccc1)(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.