Using CC(C)(C)[O-], CCOC(=O)[C@H]1[C@@H]2C(=O)C[C@@](NC(=O)OCc3ccccc3)(C(=O)OCC)[C@@H]21 to produce C=C1C[C@@](NC(=O)OCc2ccccc2)(C(=O)OCC)[C@H]2[C@@H]1[C@@H]2C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.