Using O=[N+]([O-])c1cn(CCC2CO2)c(Cl)n1, Oc1ccc(Br)nc1 to produce O=[N+]([O-])c1cn(CCC(O)COc2ccc(Br)nc2)c(Cl)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.