Carviolin is an anthraquinone fungal metabolite that has been found in Z. longicaudata with immunosuppressive and antitrypanosomal activities. It inhibits LPS- or concanavalin A-induced proliferation of mouse splenocytes (IC50s = 4 and 4.5 μg/ml, respectively). Carviolin is active against T. b. brucei (MIC = 41.66 μM).
