Using CC1=C(C)C(=O)C(C)=C(C)C1=O, CCOC(=O)C[Zn]Br to produce CCOC(=O)CC1(O)C(C)=C(C)C(=O)C(C)=C1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.