Using CCOC(=O)c1ccc(O)c(O)c1[N+](=O)[O-], BrCCBr to produce CCOC(=O)c1ccc2c(c1[N+](=O)[O-])OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.