From the chloroform fraction of the stem bark of Strychnos decussata (Pappe) Gilg (Loganiaceae), two new tertiary indole alkaloids, 10-hydroxyakagerine (1) and akagerinelactone (3), have been isolated. The structures of the alkaloids have been elucidated by means of their spectral data, particularly -nmr and 15C-nmr. © 1980, American Chemical Society. All rights reserved.