Using O=C(O)CCOc1ccc2cnn(-c3ccc(F)cc3)c2c1Br to produce O=C1CCOc2c1cc1cnn(-c3ccc(F)cc3)c1c2Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.