Abstract
Three new compounds of the rare classes trisnorditerpenes, bisnorditerpenes, and norditerpenes, gracilins J−L (1, 2, 6), and a new diterpene, 3′-norspongiolactone (8), were isolated from the extract of the marine sponge Spongionella sp. using NMR- and bioassay-guided fractionation, in addition to three known gracilins (3−5) as well as the known diterpenoid tetrahydroaplysulphurin-1 (7). The structures were elucidated using NMR spectroscopic techniques and mass spectrometric analysis. The structure of gracilin H (3) was confirmed by single-crystal X-ray analysis. All compounds were tested for their cytotoxicity and for their potential to inhibit EGF-R tyrosine kinase.
Original language | English |
---|---|
Pages (from-to) | 1471-1476 |
Number of pages | 6 |
Journal | Journal of Natural Products |
Volume | 72 |
Issue number | 8 |
DOIs | |
Publication status | Published - 14 Jul 2009 |
Externally published | Yes |