Using NCC(=O)O, O=[N+]([O-])c1cc(Cl)c(Br)cc1Cl to produce O=C(O)CNc1cc(Br)c(Cl)cc1[N+](=O)[O-], please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.