Using O=C1CCC(=O)N1Br, CCOC(=O)Cc1nnn(C(C)(C)c2ccccc2)n1 to produce CCOC(=O)C(Br)c1nnn(C(C)(C)c2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.