Using C[O-], Clc1nc2ccc(Br)cc2c(Cl)c1Cc1cc2ccccc2s1 to produce COc1nc2ccc(Br)cc2c(Cl)c1Cc1cc2ccccc2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.