Sinulanorcembranolide A, a novel norcembranoidal diterpene from the octocoral Sinularia gaweli

A novel norcembranoidal diterpene, sinulanorcembranolide A (1), which was found to possess a new carbon skeleton, was isolated from an octocoral identified as Sinularia gaweli. The structure of 1 was elucidated by spectroscopic methods. Sinulanorcembranolide A (1) was proven to be the first norcembranoidal diterpene with carbon-carbon linages between C-5/13 and C-7/12. A plausible biosynthetic pathway of 1 was proposed. (C) 2013 Elsevier Ltd. All rights reserved.