Using O=C([O-])O, CCC(=O)c1cnc2c(OCCSC)cccc2c1Nc1ccccc1C to produce CCC(=O)c1cnc2c(OCCS(C)=O)cccc2c1Nc1ccccc1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.