Using CCCOC(=O)c1c(C)c(OC)c(OC)c(OCC)c1-c1c(C(=O)[O-])cc(OC)c2c1OCO2 to produce CCOc1c(OC)c(OC)cc(C(=O)O)c1-c1c(C(=O)O)cc(OC)c2c1OCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.