Using [Zn+2], [Li]C12CCC(C1)C(=C)C2(C)C to produce C=C1C2CCC([Zn]C34CCC(C3)C(=C)C4(C)C)(C2)C1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.