Using [Zn+]C1CC1, COC(=O)c1c(Br)n(C(C)c2ccccc2)c2ccccc12 to produce COC(=O)c1c(C2CC2)n(C(C)c2ccccc2)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.