Three new compounds? terrestribisamide, 25R-spirost-4-en-3, 12-dione and tribulusterine, together with 10 known compounds, N-p-coumaroyltyramine, terrestriamide, hecogenin, aurantiamide acetate, xanthosine, fatty acid eater, ferulic acid, vanillin, p-hydroxybenzoic acid and beta-sitosterol, were isolated and characterized from dried fruits of Tribulus terrestris. Structures of these compounds were determined by spectral analysis. (C) 1999 Elsevier Science. All rights reserved.