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  • Title: Hirsutosterols A-G, polyoxygenated steroids from a Formosan soft coral Cladiella hirsuta.
    Author: Chen BW, Chang SM, Huang CY, Su JH, Wen ZH, Wu YC, Sheu JH.
    Journal: Org Biomol Chem; 2011 May 07; 9(9):3272-8. PubMed ID: 21431234.
    Abstract:
    Seven new polyoxygenated steroids, hirsutosterols A-G (1-7), were isolated from the Formosan soft coral Cladiella hirsuta. Their structures were elucidated by spectroscopic methods, particularly in 1D and 2D NMR experiments. The absolute configurations of 1 and 5 were determined by Mosher's method. Sterols 4-6 possess hydroxy groups at C-9 and C-11 and might be oxidatively cleaved to the corresponding 9,11-secosterols. Hirsutosterol A (1) was found to exhibit a stronger cytotoxicity against a limited panel of cancer cell lines.
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