Using CCS, CCOC(=O)c1c(Cl)nc2cc(C(F)(F)F)cnc2c1C to produce CCOC(=O)c1c(SCC)nc2cc(C(F)(F)F)cnc2c1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.