Using CCOC(=O)C(=O)OCC, CC(=O)c1cnc(Oc2ccccc2)nc1 to produce CCOC(=O)C(=O)CC(=O)c1cnc(Oc2ccccc2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.