Using O=C1CCC(=O)N1Br, CCOC(=O)c1sc(-c2ccc(C(F)(F)F)cc2)nc1C to produce CCOC(=O)c1sc(-c2ccc(C(F)(F)F)cc2)nc1CBr, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.