Using O=[N+]=O, CCCC(=O)Nc1n[nH]c2cc(Cl)c(Br)cc12 to produce CCCC(=O)Nc1n[nH]c2c([N+](=O)[O-])c(Cl)c(Br)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.