Using COc1cc(Br)cc2[nH]c3c(Cl)nc(Cl)nc3c12, CC[O-] to produce CCOc1nc(Cl)nc2c1[nH]c1cc(Br)cc(OC)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.