Using O=C([O-])Cc1nc(N2CCOCC2)cc(=O)[nH]1, COc1cccc2c1CCN2 to produce COc1cccc2c1CCN2C(=O)Cc1nc(N2CCOCC2)cc(=O)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.