The leaves of a New Caledonian celastraceae, Pleurostylia opposita (WALL.) MERRILL-METCALF, have yielded three new spermidine alkaloids, 7-hydroxypleurostyline (1), 7-hydroxycelacinnine (2), and 7'-hydroxy-7',8'-dihydropleurostyline (3), as minor basic constituents, together with three related alkaloids pleurostyline (4), celacinnine (5), and celallocinine (6).