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Spongian Diterpenes Including One with a Rearranged Skeleton from the Marine Sponge Spongia officinalis.
J Nat Prod ; 82(6): 1714-1718, 2019 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-31095383
Five new diterpenes, including an unprecedented 5,5,6,6,5-pentacyclic diterpene, sponalactone (1), two new spongian diterpenes, 17- O-acetylepispongiatriol (2) and 17- O-acetylspongiatriol (3), and two new spongian diterpene artifacts, 15α,16α-dimethoxy-15,16-dihydroepispongiatriol (4) and 15α-ethoxyepispongiatriol-16(15 H)-one (5), were isolated from a South China Sea collection of the marine sponge Spongia officinalis, together with three known analogues (6-8). The structures of the new diterpenes were elucidated by extensive spectroscopic analysis. The absolute configurations were established on the basis of ECD data. Compounds 1-5 and 7 exhibited moderate inhibition against LPS-induced NO production in RAW264.7 macrophages with IC50 values of 12-32 µM.





Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: J Nat Prod Ano de publicação: 2019 Tipo de documento: Artigo