Five new tetranortriterpenoids, toonaciliatones B-F ( 1- 5, resp.), together with four known compounds, dihydrocedrelone ( 6), cedrelone ( 7), 6 α-acetoxyazadirone ( 8), and 6 α-acetoxy-14 β,15 β-epoxyazadirone ( 9), were isolated from the seeds of Toona ciliata. Their structures were elucidated by spectroscopic methods, including 1D- and 2D-NMR spectroscopy.