Using C[O-], COc1ccc(-c2ccc3nnc(-c4cccnc4Cl)n3c2)cc1 to produce COc1ccc(-c2ccc3nnc(-c4cccnc4OC)n3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.