Using CC(C)(C)OC(=O)N1CCNCC1, O=C(O)c1cc2cccc([N+](=O)[O-])c2[nH]1 to produce CC(C)(C)OC(=O)N1CCN(C(=O)c2cc3cccc([N+](=O)[O-])c3[nH]2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.