Using O=C([O-])O, COc1ccc(-c2nn3ccc(Br)cc3c2/C=C/C=[N+](C)C)cc1 to produce COc1ccc(-c2nn3ccc(Br)cc3c2/C=C/C=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.