<jats:title>Abstract</jats:title><jats:p>Two new alkaloids, 3‐epi‐2, 18‐dimethoxy‐schelhammericine and lenticellarine and a new diterpene, 8β‐methoxysandaracopimarene isolated from the stem of <jats:italic>Dysoxylum lenticellare</jats:italic> Gillespie were tested against <jats:italic>Biomphalaria glabrata</jats:italic> Say and found to possess molluscicidal activity.