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  • Title: Spongian diterpenoids from the sponge Spongia (Heterofibria) sp.
    Author: Ponomarenko LP, Kalinovsky AI, Afiyatullov SSh, Pushilin MA, Gerasimenko AV, Krasokhin VB, Stonik VA.
    Journal: J Nat Prod; 2007 Jul; 70(7):1110-3. PubMed ID: 17567172.
    Abstract:
    Five new (1, 2, 4-6) and one known (3) diterpenoid were isolated from the keratose sponge Spongia (Heterofibria) sp. Structures of these compounds and their absolute configurations were proposed on the basis of X-ray analysis of 1, its CD spectrum, and NMR and MS spectroscopic studies of 1-6. One of the new diterpenoids was shown to be 2(R),3(S),4(S)-3,18-methylene-2-acetoxyspongia-13(16),14-diene (6), possessing a novel carbon skeleton system.
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