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  • Title: Structural revision of methyl tortuoate D, a bis-cembranoid from Hainan Sarcophyton tortuosum and its absolute stereochemistry.
    Author: Li YF, He LL, Liu HL, Liang LF, Zhang HB, Guo YW.
    Journal: J Asian Nat Prod Res; 2013; 15(5):566-73. PubMed ID: 23638960.
    Abstract:
    Methyl tortuoate D (1), together with five other known related bis-cembranoids, was isolated from Hainan soft coral Sarcophyton tortuosum. The structure of methyl tortuoate D (1a), firstly isolated and reported by Li et al. from the title organism, was corrected as 1 by an extensive analysis of its one-dimensional and two-dimensional nuclear magnetic resonance data and by comparison with those reported in the literature. In addition, lobophytone K (1b), recently isolated from Hainan soft coral Lobophytum pauciflorum by Lin et al., was proved to be the same compound as 1 and 1a. The absolute configuration of 1 was determined by comparing its electronic circular dichroism curve with that of co-occurring ximaolide A (2).
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