Using Cn1c(NCCOS(C)(=O)=O)c([N+](=O)[O-])c(=O)n(C)c1=O to produce Cn1c(N2CC2)c([N+](=O)[O-])c(=O)n(C)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.