Using CC1=CN(C(=O)C(C)(C)C)C(N)C=C1, O=C1CCC(=O)N1Br to produce CC(C)(C)C(=O)N1C=C(CBr)C=CC1N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.