A pharmacological screening of the ethanol extract and fractions of Blepharodon nitidum led to the isolation of fourteen compounds, two of which, 24-hydroperoxycycloart-25-en-3β-ol and 25-hydroperoxycycloart-23-en- 3β-ol, exhibited in vitro anti-Mycobacterium tuberculosis and antileishmanial activities, as well as significant cytotoxic activity against a panel of human tumor cell lines. © Georg Thieme Verlag KG Stuttgart.