Using CCOC(=O)C(=O)OCC, CC(=O)c1c(O)ccc2c1OCc1ccccc1C2=O to produce CCOC(=O)c1cc(=O)c2c3c(ccc2o1)C(=O)c1ccccc1CO3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.