Using CCOC(=O)CC(c1ccc(-c2ccccc2)cc1)n1cnc2ccccc21 to produce O=C(O)CC(c1ccc(-c2ccccc2)cc1)n1cnc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.