A new cubitane diterpenoid, crassalone A (1), was isolated from the marine soft
coral Sinularia crassa. The structure was determined by extensive spectroscopic analyses.
Compound 1 is not cytotoxic (IC50 > 20 μg/mL) toward the four human cancer cell lines
tested (HL60, MDA-MB-231, HCT-116 and DLD-1).
