Using CN(NC(=O)C1CCC2CN1C(=O)N2OS(=O)(=O)O)C(=O)OC(C)(C)C to produce CNNC(=O)C1CCC2CN1C(=O)N2OS(=O)(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.