Using COS(=O)(=O)OC, O=c1[nH]c(-c2c(F)cccc2F)nn1-c1ccccc1C(F)(F)F to produce COc1nc(-c2c(F)cccc2F)nn1-c1ccccc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.