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Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Cyclized 9,11-secosterol enol-ethers from the gorgonian Pseudopterogorgia americana.
Steroids 2017 September
Chemical investigation of the MeOH extract from the gorgonian Pseudopterogorgia americana afforded two rare sterols, ameristerenol A (1) and B (2), both 9,11-secosterols possesses a seven-membered cyclic enol-ether in ring C, and ameristerol A (3) is the first example of a naturally occurring 9,11-secosterol containing a gorgosterol side chain with a C-24(28) double bond. Ameristerenol A (1) was converted to the sterol derivatives 4-6 to provide additional chemical diversity and comparison for biological screening. The structures of compounds 1-6, along with three related known analogues 7-9, were determined on the basis of extensive spectroscopic analysis and by comparison with literature data. Compound 6 exhibited slight cytotoxicity activity against human breast cancer cell line MDA-MB-231.
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