A new cubitane-based diterpenoid, triangulene C (1), was isolated from the soft coral Sinularia triangula and its structure was elucidated on the basis of spectroscopic data. Compound 1 was not cytotoxic (IC50 >20 μg/mL) toward the four human cancer cell lines tested (HL60, MDA-MB-231, HCT-116 and DLD-1).
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