Using COC(=O)C1CCN(C(=O)c2ccc3cc(OC(C)=O)ccc3c2)CC1 to produce COC(=O)C1CCN(C(=O)c2ccc3cc(O)ccc3c2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.