Using C=CCOc1ccccc1C(C(OCC)OCC)C(C(=O)OCC)C(=O)OCC, CC[O-] to produce C=CCOc1ccccc1C(C(OCC)OCC)C(C)(C(=O)OCC)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.