Using COc1cc(N2CCN(C(=O)Cn3ncc4c(Cl)ncnc43)CC2)ccc1Cl, O=C([O-])[O-] to produce COc1cc(N2CCN(C(=O)Cn3ncc4c(OC)ncnc43)CC2)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.