Guanahanolide A, a Meroterpenoid with a Sesterterpene Skeleton from Coral-Derived Streptomyces sp.

A meroterpenoid, guanahanolide A (1), was purified from a fermentation extract of Streptomyces sp. RKBH-B7. The planar structure of guanahanolide A (1) was elucidated by NMR spectroscopy, revealing...