Using COC(=O)Cc1cccc(C(C(=O)OC)C(=O)OC)c1, CC(C)(C)[O-] to produce COC(=O)Cc1cccc(C(C)(C(=O)OC)C(=O)OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.