Using O=C(O)C(F)(F)F, Brc1ccn(CCNC(c2ccccc2)(c2ccccc2)c2ccccc2)n1 to produce CC(=O)NCCn1ccc(Br)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.