Using COCCn1c(S(C)(=O)=O)nc2cccnc21, Oc1ccc(-c2nn(CC(F)F)c3cccnc23)cc1 to produce COCCn1c(Oc2ccc(-c3nn(CC(F)F)c4cccnc34)cc2)nc2cccnc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.