Using COC(=O)c1ccc(-c2cc(=O)cc(N3CCOCC3)o2)cc1 to produce O=C([O-])c1ccc(-c2cc(=O)cc(N3CCOCC3)o2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.