Using CCCC(=O)c1cnc2ccc(COC(=O)c3ccccc3)cc2c1Nc1ccccc1C to produce CCCC(=O)c1cnc2ccc(CO)cc2c1Nc1ccccc1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.