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  • Title: C28 sterols with a cyclopentane ring at C-22 and 26 from cape gooseberry (berries of Physalis pubeacens L.).
    Author: Xu QM, Liu YL, Feng YL, Li XR, Yang SL.
    Journal: J Asian Nat Prod Res; 2010 Sep; 12(9):752-9. PubMed ID: 20839121.
    Abstract:
    Two new C28 sterols with a cyclopentane ring at C-22 and 26, alkesterol A (1) and alkesterol B (2), along with β-sitosterol (3), were isolated from the berries of Physalis pubeacens L. (cape gooseberry). The structures of the new compounds were established by HR-EI-MS, 1D and 2D (1H-1H COSY, HSQC, HMBC) NMR experiments. The known compound was identified by comparison of spectral data with published references. The two new compounds showed some cytotoxic activities by MTT assay.
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