Using [Li]C, CCOC(=O)C(=CC1CCN(C(=O)OC(C)(C)C)CC1)C(=O)OCC to produce CCOC(=O)C(C(=O)OCC)C(C)C1CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.