New triterpenoids from the Red Sea sponge Siphonochalina siphonella.

@article{Kashman2001NewTF,
  title={New triterpenoids from the Red Sea sponge Siphonochalina siphonella.},
  author={Yoel Kashman and Tesfamariam Yosief and Shmuel Carmeli},
  journal={Journal of natural products},
  year={2001},
  volume={64 2},
  pages={175-80}
}
Clear differences were found when comparing the chemical content of the northern, Gulf of Eilat, to the southern-central, Dahlak archipelago, Red Sea sponge Siphonochalina siphonella. The Dahlak sponge was found to be richer in the more polar triterpenes. Nine new compounds (1-4, 7, 8, 15-17) were isolated and identified, among them two sipholane glycosides, sipholenoside A and B (7 and 8), and one compound, dahabinone A (17), possessing a new skeleton. 

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