Using CC(C)(C)OC(=O)CBr, O=C1CCNc2c(F)cccc2N1 to produce CC(C)(C)OC(=O)CN1C(=O)CCNc2c(F)cccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.