Using COC(=O)CC1CCn2c1cc1c(S(C)(=O)=O)cc(OC)cc12 to produce COC(=O)CC1CCn2c1cc1c(S(C)(=O)=O)cc(O)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.