Using C[O-], COCCOc1nc(N)c2nc(Br)n(Cc3cccc(CO)c3)c2n1 to produce COCCOc1nc(N)c2nc(OC)n(Cc3cccc(CO)c3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.