Using Cc1cc(Br)cc(C)c1CC=O, COP(=O)(CC(=O)OC(C)(C)C)OC to produce Cc1cc(Br)cc(C)c1C/C=C/C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.