Using COc1ccc(-c2coc3c(C)c(OC(C)=O)ccc3c2=O)cc1OC to produce COc1ccc(C2COc3c(ccc(OC(C)=O)c3C)C2O)cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.