Using FC(F)(F)CI, CC1(C)C(=O)Nc2nc(-c3nn(Cc4ccccc4F)c4ncccc34)nc(O)c21 to produce CC1(C)C(=O)Nc2nc(-c3nn(Cc4ccccc4F)c4ncccc34)nc(OCC(F)(F)F)c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.