Abstract:From the stems of Marsdenia griffithii Hook.f, a new trkerpenoid named griffitho; (IV) with oleanic acid (I), longispenogenin (II) and chichipegenia (III) were isolated. On the basis of spectral data, griffithol (IV) was tentatively deduced as clean -12-ene-3β,16β, 21β. 22α, 28-pentatol.