Using Cc1cc(C(=O)c2ccc(O)cc2)ccc1Br, O=C1CCCCC1 to produce Cc1cc(C(=C2CCCCC2)c2ccc(O)cc2)ccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.