Using O, COc1ccc([N+](=O)[O-])cc1CN1C(=O)c2ccccc2C1=O to produce COc1ccc([N+](=O)[O-])cc1CNC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.