Using O=[N+]=O, COC(=O)c1ccc(N2CCCC2=O)cc1 to produce COC(=O)c1ccc(N2CCCC2=O)c([N+](=O)[O-])c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.