Two new alkaloids of conanine series, holamide (N-(N′-methylacetamido)-3-oxo-1,4-conadiene) (1), pubescinine (11α-acetoxy-N-demethyl-3-oxo-1,4,17(20)-conatriene) (2) and a known alkaloid norconessine (3-N-methylamino-5-conanene) (3), have been isolated from the bark of Holarrhena pubescens Buch. Ham (Holarrhena antidysenterica Linn.) (Apocynacea). Their structures have been established through spectroscopic studies. Both 1 and 2 showed hypotensive activity in rats at a dose of 3 mg/kg. © 1995.