Using O, CC1=CCC2C(C1)c1c(O)cc(C3SCCS3)cc1OC2(C)C to produce CC1=CCC2C(C1)c1c(O)cc(C=O)cc1OC2(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.