Using CC(=O)C1COc2ccccc2C1=O, CCOC(=O)C(=O)OCC to produce CCOC(=O)C(=O)CC(=O)C1COc2ccccc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.