Using COc1cccc(C=C(OC(C)=O)C(=O)NC2CCC(C)(C)CC2)c1, O=C([O-])[O-] to produce COc1cc(C=CC(=O)NC2CCC(C)(C)CC2)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.