Using [Li]C, CCOP(=O)(OCC)OC1=C(C(=O)OC)C(C)(c2ccc(Cl)c(Cl)c2)CC(C)C1 to produce COC(=O)C1=C(C)CC(C)CC1(C)c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.