Using COc1ccc(C2=C(CC(C)NC(C)C)C(=O)NCCC2)cc1, O=C([O-])[O-] to produce COc1ccc(C2=C(CC(C)N(C)C(C)C)C(=O)NCCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.