Using CC(C)c1cc(Br)cc(C(C)C)c1C=O, COC[P+](c1ccccc1)(c1ccccc1)c1ccccc1 to produce COC=Cc1c(C(C)C)cc(Br)cc1C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.