Using CCOC(=O)Cc1cc2c(c(C(=O)c3ccc(OC)cc3)c1OC)OCC2 to produce CCOC(=O)Cc1cc2c(c(C(=O)c3ccc(OC)cc3)c1O)OCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.