Author： Li Li-Ya Deng Zhi-Wei Fu Hong-Zheng Li Jun Lin Wen-Han Proksch Peter
Publisher： Taylor & Francis Ltd
ISSN： 1028-6020
Source： Journal of Asian Natural Products Research, Vol.7, Iss.2, 2005-04, pp. : 115-120
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Abstract
Five sterols with a nucleus skeleton of 6-hydroxy-4-en-3-one, namely cholesta-6β-hydroxy-4-en-3-one ( 1 ), ergosta-6β-hydroxy-4,24(28)-dien-3-one ( 2 ), ergosta-6α-hydroxy-4,24(28)-dien-3-one ( 3 ), ergosta-6α-hydroxy-4,22- E -dien-3-one ( 4 ), and ergosta-28-methyl-6β-hydroxy-4,24(28)-dien-3-one ( 5 ) have been isolated from the marine sponge Iotrochoto birotulata , collected from the southern China sea. Sterols 2-4 are new compounds, and 1 has been isolated from marine organisms for the first time. The structures have been elucidated on the basis of extensive spectroscopic and chemical properties.
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