Using O=C(c1c2n(c3cc(Br)ccc13)CCN(C(=O)C(F)(F)F)CC2)C(F)(F)F to produce O=C(c1c2n(c3cc(Br)ccc13)CCNCC2)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.