Using Oc1cnc(Cl)nc1, CC1(COS(C)(=O)=O)COC(C)(C)OC1 to produce CC1(COc2cnc(Cl)nc2)COC(C)(C)OC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.