Using CN(CC=O)C(=O)OC(C)(C)C, O=[N+]([O-])c1ccc2c(c1)NCCO2 to produce CN(CCN1CCOc2ccc([N+](=O)[O-])cc21)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.