Using CN1Cc2c(N3CCC(=O)CC3)ccc([N+](=O)[O-])c2C1=O, CC(C)(C)OC(=O)N1CCNCC1 to produce CN1Cc2c(N3CCC(N4CCN(C(=O)OC(C)(C)C)CC4)CC3)ccc([N+](=O)[O-])c2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.