Using O=C1CCC(=O)N1Br, COc1c(Cl)cc(C)c2cnn(S(=O)(=O)c3ccccc3)c12 to produce COc1c(Cl)cc(CBr)c2cnn(S(=O)(=O)c3ccccc3)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.