Bioactive Cembranoids from the Coral of Ximao Island.

Eight new cembranoids (sarcophytembranoids A-H, -) and 10 known terpenoids (-) were obtained from the soft coral of Ximao Island. Notably, , , and were obtained from a natural source for the first time. The structures of the new isolates were elucidated by extensive spectroscopic analysis, optical rotatory dispersion, and X-ray diffraction experiments.

Sinunanolobatone A, an Anti-inflammatory Diterpenoid with Bicyclo[13.1.0]pentadecane Carbon Scaffold, and Related Casbanes from the Sanya Soft Coral .

A novel diterpenoid, sinunanolobatone A (), featuring an unprecedented bicyclo[13.1.0]pentadecane carbon framework, along with two new casbane diterpenoids ( and ), and five known related ones (-) were isolated from the Sanya soft coral .

Sinusiaetone A, an Anti-inflammatory Norditerpenoid with a Bicyclo[11.3.0]hexadecane Nucleus from the Hainan Soft Coral .

A novel norditerpenoid, sinusiaetone A (), featuring an uncommon bicyclo[11.3.0]hexadecane carbon skeleton, and four polyoxygenated cembranoids () were isolated from the Hainan soft coral .