Using O=Cc1ccc2cc(Br)ccc2c1, CCC(CC)(c1ccc(Br)cc1)P(=O)([O-])[O-] to produce Brc1ccc(/C=C/c2ccc3cc(Br)ccc3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.