Abstract
Five undescribed biscembranoids, bistrochelides H−L, along with four known biscembranoids, glaucumolides A−B and bistrochelides A−B, were isolated from the soft coral Sarcophyton serenei collected off the Xisha Island in the South China Sea. The structures of these compounds were elucidated by HRESIMS (high-resolution electrospray ionization mass spectroscopy) spectrometry, NMR (nuclear magnetic resonance) spectroscopy, X-ray diffraction analysis, electronic circular dichroism (ECD), and the comparison of their spectroscopic data with those reported in the literature. In bioassay, some compounds showed a strong inhibitory effect on osteoclast precursor cells at the concentration of 10 μM. Additionally, all compounds exhibited weakly antimicrobial activity against Vibrio harveyi.
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