Using CN(C)CC[P+](c1ccccc1)(c1ccccc1)c1ccccc1, O=C(c1ccc(Cl)cc1)c1cccc(Br)n1 to produce CN(C)/C=C\C(c1ccc(Cl)cc1)c1cccc(Br)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.