Using CC(=O)O, CCOC1CCSc2c(C)cc(C(=O)O)c(C)c21 to produce CCOC1CCS(=O)c2c(C)cc(C(=O)O)c(C)c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.