Using C=CC(N)=O, COc1cc(Nc2ncc3c(C)nc(-c4cccc(Br)c4)n3n2)cc(OC)c1OC to produce COc1cc(Nc2ncc3c(C)nc(-c4cccc(/C=C/C(N)=O)c4)n3n2)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.