Using COCCBr, Cc1nc(-c2nc(-c3ccc(OC(F)(F)F)cc3)cs2)nn1Cc1cccc(O)c1 to produce COCCOc1cccc(Cn2nc(-c3nc(-c4ccc(OC(F)(F)F)cc4)cs3)nc2C)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.