Using CCOC(=O)Cc1cc2c(c(OC)c1)C(=O)c1ccccc1CC2 to produce COc1cc(CC(=O)O)cc2c1C(=O)c1ccccc1CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.