Using CCCCNc1c([N+](=O)[O-])cc(C(=O)O)cc1S(N)(=O)=O to produce CCCCNc1c(N)cc(C(=O)O)cc1S(N)(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.