Krempenes A–D: A Series of Unprecedented
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Xinping Huang; Zhiwei Deng; Xiaobin Zhu; Leen van Ofwegen; Peter Proksch; Wenhan
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Article
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2006
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John Wiley and Sons
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German
⚖ 76 KB
Four new pregnane-type steroids, krempenes A -D (1 -4), were isolated from the marine soft coral Cladiella krempfi. Their structures were elucidated on the basis of 1D-and 2D-NMR analyses, as well as MS experiments. Krempene A (1) contains a very unusual structural motif, with a hexacyclic oxadithii