Using COc1ccc(C(O)(Cc2ccncc2)c2ccccc2)c2c1OC(C)(C)C2, O=C([O-])O to produce COC1(OC)CC=C(C(Cc2ccncc2)c2ccccc2)C2=C1OC(C)(C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.