Three new cytotoxic cembrenolide diterpenes, sarcocrassolide (1), crassolid
e (2), and 13-acetoxysarcocrassolide (3); a known cytotoxic cembrenolide, d
enticulatolide (4); and two cytotoxic steroids, (24S)-24-methylcholestane-3
beta ,5 alpha ,6 beta -triol (5) and 24 zeta -methylcholestane-3 beta ,5 a
lpha ,6 beta ,25-tetraol-25-monoacetate (6), have been isolated from the Fo
rmosan soft coral Sarcophyton crassocaule. The structures of compounds 1-6
were determined by 1D and 2D spectral analysis.