Using COc1ncc(Br)c(C)c1[N+](=O)[O-], COC(OC)N(C)C to produce COc1ncc(Br)c(/C=C/N(C)C)c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.