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  • Title: A pair of 3-epimeric physalins from Physalis alkekengi L. var. franchetii.
    Author: Qiu L, Jiang ZH, Liu HX, Chen LX, Yao XS, Qiu F.
    Journal: J Asian Nat Prod Res; 2008; 10(9-10):881-5. PubMed ID: 18985501.
    Abstract:
    A pair of new 3-epimeric steroids possessing a rare 13,14-seco-16,24-cycloergostane skeleton, 3alpha-methoxy-2,3-dihydro-4,7-didehydrophysalin B (1), and 3beta-methoxy-2,3-dihydro-4,7-didehydrophysalin B (2) were isolated from the 60% EtOH extract of the stems and leaves of Physalis alkekengi L. var. franchetii. Their structures were characterized on the basis of spectral evidence.
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