Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10847742 | Steroids | 2005 | 6 Pages |
Abstract
Fifteen steroids were isolated from the soft coral Dendronephthya sp., of which five are determined as new compounds, namely (22E)-3-O-β-formylcholest-5,22-diene (1), (22E)-3-O-β-formyl-24-methyl-cholest-5,22-diene (2), 2-ethoxycarbonyl-2-β-hydroxy-A-nor-cholest-5-ene-4-one (3), (22E)-2-ethoxycarbonyl-2-β-hydroxy-A-nor-cholest-5,22-diene-4-one (4), and (22E)-2-ethoxycarbonyl-2-β-hydroxy-24-mthyl-A-nor-cholest-5,22-diene-4- one (5). 1 and 2 belonged to 3-O-formylated cholesterol analogues, and 3 to 5 are unique ring A-contracted steroids. Their structures were elucidated by extensive 2D NMR in association with IR, MS analysis.
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Authors
Guoqiang Li, Zhiwei Deng, Huashi Guan, Leen van Ofwegen, Peter Proksch, Wenhan Lin,