Using CC(C)(C)OC(=O)N1CCC(=O)CC1, Brc1cccc(C[P+](c2ccccc2)(c2ccccc2)c2ccccc2)c1 to produce CC(C)(C)OC(=O)N1CCC(=Cc2cccc(Br)c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.