Using CCCCOc1c(OC(C)=O)c(=O)oc2cc(OC(C)=O)ccc12 to produce CCCCOc1c(OC(C)=O)c(=O)oc2cc(O)ccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.