Using O=C1CCC(=O)N1Br, Cc1nn(C(=O)OC(C)(C)C)c2ccccc12 to produce CC(C)(C)OC(=O)n1nc(CBr)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.