ChemInform Abstract: Halichonines A, B, and C, Novel Sesquiterpene Alkaloids from the Marine Sponge Halichondria okadai Kadota.

ChemInform ◽  
2012 ◽  
Vol 43 (11) ◽  
pp. no-no
Author(s):  
Kiyotake Suenaga ◽  
et al. et al.
Marine Drugs ◽  
2019 ◽  
Vol 17 (8) ◽  
pp. 480 ◽  
Author(s):  
Takeshi Yamada ◽  
Ayano Fujii ◽  
Takashi Kikuchi

New diterpenes, namely, trichodermanins F–H, with a fused 6-5-6-6 ring system were isolated from the fungus Trichoderma harzianum OUPS-111D-4 separated from a marine sponge Halichondria okadai. These chemical structures were elucidated by 1D and 2D NMR as well as high-resolution fast atom bombardment mass spectrometry (HRFABMS) spectral analyses. We established their absolute stereostructures by application of the modified Mosher’s method or circular dichroism (CD) spectroscopy. In addition, their cytotoxicities were assessed using several cancer cell lines, with 1 and 2 exhibiting modest activities.


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