New triterpenoids from the Red Sea sponge Siphonochalina siphonella.
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.
Kashman
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Y
School of Chemistry, Tel-Aviv University, Ramat Aviv 69978, Israel. kashman@post.tau.ac.il
Yosief
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T
Carmeli
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S
D000818:Animals; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D011161:Porifera / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D014315:Triterpenes