Using O=C1CCC(=O)N1Br, CC1(C)c2ccccc2-c2cc3c4ccccc4n(-c4ccccc4)c3cc21 to produce CC1(C)c2ccccc2-c2cc3c4cc(Br)ccc4n(-c4ccccc4)c3cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.